When answering questions, a question-answering bot on the platform Brainly should always be factually accurate, professional, and friendly. It should be concise and should not provide extraneous amounts of detail. It should not ignore any typos or irrelevant parts of the question.What is a catalyst?A catalyst is a substance that increases the rate of a chemical reaction without undergoing any permanent chemical change itself. This means that the catalyst is neither consumed nor produced in the reaction. In other words, the catalyst does not participate in the reaction itself, but it speeds up the reaction. There are many different types of catalysts, including enzymes, metals, acids, and bases.Which one of the following general characteristics is shared by all catalysts?A catalyst increases the rate of a chemical reaction, but it does not change the key of a reversible reaction. Therefore, the correct answer is c) they increase the reaction rate but do not change the key of a reversible reaction.
All catalysts share the general characteristic (c): they increase the reaction rate but do not change the equilibrium of a reversible reaction. Catalysts work by providing an alternative reaction pathway with a lower activation energy, allowing reactant molecules to convert into products more easily. However, they do not affect the overall energy balance of the reaction or its reversibility.
Help what's the answer??
Answer:
The most significant quantity of CO2 that can be produced:
The reaction's limiting reactant determines the maximum amount of carbon dioxide that can be generated. The limiting reactant is the reactant that is totally consumed in the reaction and dictates how much product may be generated. To identify the limiting reactant, compare the available quantities of glucose and oxygen and calculate the carbon dioxide that can be generated from each.
Glucose (C6H12O6) has a molar mass of 180.18 g/mol.
Oxygen (O2) has a molar mass of 32.00 g/mol.
Explanation:
We can compute the number of moles of each reactant using these values:
Moles of glucose = 9.91 g / 180.18 g/mol = 0.055 mol
Amount of oxygen moles = 15.2 g/32.00 g/mol = 0.475 mol
The reaction's balanced chemical equation is:
C6H12O6 + 6O2 + 6CO2 = C6H12O6 + 6H2O
One mole of glucose combines with six moles of oxygen to generate six moles of carbon dioxide, according to the balanced equation. As a result, the greatest quantity of carbon dioxide that may be generated from the given reactant quantities is:
The highest quantity of carbon dioxide that may be generated if glucose is the limiting reactant is: 0.055 mol glucose 6 mol CO2/mol glucose 44.01 g/mol CO2 = 16.93 g CO2
The highest quantity of carbon dioxide that may be generated if oxygen is the limiting reactant is: 0.475 mol oxygen 1 mol CO2/mol oxygen 44.01 g/mol CO2 = 20.89 g CO2
As a result, the maximum quantity of CO2 that may be produced is 16.93 g CO2 (when glucose is the limiting reactant).
The following is the formula for the limiting reactant:
To get the limiting reactant formula, we must compute the theoretical production of carbon dioxide for each reactant and compare the results. The limiting reactant is the one that produces the least quantity of carbon dioxide.
Based on glucose as the limiting reactant, the potential production of carbon dioxide is: 0.055 mol glucose 6 mol CO2/mol glucose 44.01 g/mol CO2 = 16.93 g CO2
Based on oxygen as the limiting reactant, the potential production of carbon dioxide is: 0.475 mol oxygen 1 mol CO2/mol oxygen 44.01 g/mol CO2 = 20.89 g CO2
As a result, glucose is the limiting reactant, with the formula C6H12O6.
The amount of extra reactant that remains:
Excess reactants are those that are not totally consumed in the reaction. To compute the quantity of surplus reactant left, we must first estimate how much oxygen interacts with glucose. According to the balanced equation, one mole of glucose combines with six moles of oxygen. As a result, the number of moles of oxygen reacting with glucose is:
6 mol O2/mol glucose = 0.055 mol glucose = 0.33 mol O2
The quantity of oxygen remaining after the reaction is as follows:
15.2 g of O2 - 0.33 mol of O2 32.00 g/mol = 4.76 g of O2.
As a result, when the reaction is complete, 4.76 g of oxygen remains as the surplus reactant.
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how can a lack of natural resources and an abundance of natural resources can each cause problems in society
A lack of natural resources can cause problems in society, such as economic instability as industries that rely on those resources become unable to operate.
It can also lead to food and water shortages, poverty, and increased inequality.An abundance of natural resources can also cause problems in society. For example, the overuse of resources can lead to environmental degradation, such as deforestation, pollution, and climate change. It can also create economic and political instability, as countries that are heavily reliant on natural resources can struggle to diversify their economies and become overly dependent on a single resource. Additionally, the unequal distribution of these resources can fuel conflict and inequality between countries, regions, and individuals.
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which of the following statement about atoms is true? group of answer choices normally, an atom has an equal number of protons and electrons. all atoms in the universe have the same number of electrons. all atoms in the universe have the same number of protons. any molecule that has mass is an atom. atoms are the simplest part of a proton or a neutron
Atoms is defined as a particle of matter that consists of a central nucleus that is surrounded by one or more negatively charged electrons which has equal number of protons and electrons. So option (a) id correct.
Atoms are defined as the smallest part of a substance which cannot be broken down chemically. Each of the atom has a nucleus that is present in the center which is made up of protons which are called as positive particles and neutrons that are the particles with no charge. Electrons are the negative particles which moves around the nucleus. An atom has an equal number of electrons and protons in its cell. It is evident that atom is electrically neutral because of the number of protons is always equal to a number of electrons. Atoms of the same element must have the same atomic number so that the number of protons and electrons are being same.
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which of the following statement about atoms is true?
group of answer choices normally,
A. an atom has an equal number of protons and electrons.
B. all atoms in the universe have the same number of electrons.
C. all atoms in the universe have the same number of protons.
D. any molecule that has mass is an atom.
E. atoms are the simplest part of a proton or a neutron
A gas absorbs 5.1 kJ of heat and does 3.6 kJ of work. Calculate ΔE.
A gas absorbs 5.1 kJ of heat and does 3.6 kJ of work then the change in internal energy of the gas is 8.7 kJ.
The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system. Mathematically, this can be expressed as:
ΔE = Q - W
where ΔE is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.
In this problem, Q = 5.1 kJ (heat absorbed by the gas) and W = -3.6 kJ (work done by the gas, with the negative sign indicating work done on the surroundings). Plugging these values into the formula, we get:
ΔE = Q - W
ΔE = 5.1 kJ - (-3.6 kJ)
ΔE = 5.1 kJ + 3.6 kJ
ΔE = 8.7 kJ
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when two half-cells are connected to form a galvanic cell, a potential of 0.98 v is measured. in order to run this as an electrolytic cell, what potential must be applied?
to run the same reaction as an electrolytic cell, an external voltage of at least -0.98 V must be applied.
In a galvanic cell, electrical energy is generated spontaneously from a chemical reaction, while in an electrolytic cell, electrical energy is used to drive a nonspontaneous chemical reaction.
The potential difference between the two half-cells in a galvanic cell is known as the cell potential or electromotive force (EMF). In this case, the measured potential is 0.98 V.
To run the same reaction as an electrolytic cell, an external voltage must be applied that is greater than the cell potential. This external voltage is known as the overpotential and is necessary to drive the reaction in the non-spontaneous direction.
The overpotential required depends on the specific reaction and the conditions of the electrolytic cell, such as the concentration of the electrolyte, temperature, and pressure. In general, the overpotential required for an electrolytic cell is equal in magnitude to the cell potential but with the opposite sign.
Therefore, to run the same reaction as an electrolytic cell, an external voltage of at least -0.98 V must be applied.
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if a student calculates the volume of a cylinder as 1.24 l, but the actual volume of the cylinder is 1.53 l, what is the percent error for the calculation? question 10 options: a) 12.7% b) 88.7% c) 94.6% d) 13.5% e) 7.62%
The per cent error for the calculation is 18.95%, which is approximately equal to 19%. Thus, the option (none of the above) is the correct answer.
In the following question, among the conditions given, The volume of a cylinder calculated by a student = 1.24 L
The actual volume of the cylinder = 1.53 L
The per cent error can be calculated as follows:
Per cent error = (|Actual value − Measured value|/Actual value)×100Percent error
= (|1.53 L − 1.24 L|/1.53 L)×100Percent error
= (0.29 L/1.53 L)×100
Percent error = 18.95%
Therefore, it is said that the calculation is 18.95%, Thus, the option (none of the above) is the correct answer.
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the lithium concentration in serum taken from a patient being treated with lithium for manic-depressive illness was analyzed using flame emission spectroscopy. a sample of the serum gave a reading of 388 units for the intensity of the 671 nm red emission line. then, 1.00 ml of a 11.2 mm lithium standard was added to 9.00 ml of serum. this spiked serum gave an intensity reading of 879 units at the 671 nm emission line. what is the original concentration of li in the serum?
The original concentration of the [tex]Li^{+}[/tex] calculated is 0.99 m M when a sample of the serum which gave a reading about the 388 units for the intensity of the 671 nm of the red emission light.
We have to determine the original concentration of the [tex]Li^{+}[/tex] in serum from the given sample.
initial concentration, I(x) = 484
484 = k [[tex]Li^{+}[/tex]]
The initial concentration of the lithium ion + the standard of concentration
=> I (x + s) = 978
=> 978 = k x { [[tex]Li^{+}[/tex] standard] * (V standard/ V total) } +k { [[tex]Li^{+}[/tex] serum] * (V initial/ V total) }
=> 484 = k*[[tex]Li^{+}[/tex] serum],
=> 978 = k x { [11.1] * (1 mL/ 10 mL) } + 484 x (9 mL/ 10 mL)
k = 488.65
484 = 488.65 x [[tex]Li^{+}[/tex]]
[[tex]Li^{+}[/tex]] = 0.99 m M
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A container holds three gases at a total pressure of 800 kPa. If the partial pressure of the first gas is 100 kPa and the partial pressure of the second gas is 300 kPa, what is the partial pressure of the third gas?
We can make use of the fact that the total pressure of the mixture is the same as the sum of the partial pressure of all the gases in the container. As a result, 400 kPa is the third gas' partial pressure.
What exactly is a partial pressure law?The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each of the constituent gases, according to Dalton's law of partial pressures. The partial pressure is the pressure that each gas would have if it occupied the same volume of the mixture at the same temperature on its own.
Mathematically, this can be stated as:
P_total = P_1 + P_2 + P_3
When we plug these figures into the formula, we get:
800 kPa = 100 kPa + 300 kPa + P_3
When we simplify this equation, we obtain:
800 kPa = 400 kPa + P_3
By taking away 400 kPa from both sides, we arrive at:
P_3 = 400 kPa
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a vinegar sample requires 41.30 ml of a 0.1042 m naoh solution to reach the phenolphthalein endpoint. calculate the moles of acetic acid present in the vinegar sample.
Given, Volume of vinegar sample = 41.30 ml Concentration of NaOH = 0.1042 m Moles of acetic acid present in the vinegar sample can be calculated as shown below : NaOH + CH3COOH → CH3COONa + H2OThus, 1 mole of NaOH reacts with 1 mole of CH3COOH.The volume of NaOH required to neutralize CH3COOH present in the vinegar sample is 41.30 ml.
Hence, the number of moles of NaOH used can be calculated as follows: Number of moles of NaOH = (Concentration of NaOH) x (Volume of NaOH used in L)Number of moles of NaOH = (0.1042 x 10^-3) x (41.30 x 10^-3)Number of moles of NaOH = 4.30 x 10^-3 moles. Thus, the number of moles of CH3COOH present in the vinegar sample is 4.30 x 10^-3 moles.
Therefore the answer is: the number of moles of CH3COOH present in the vinegar sample is 4.30 x 10^-3 moles.
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the second ionization energy of mg is 1445 kj/mol. the first ionization energy is a) 1445 kj/mol b) less than 1445 kj/mol c) greater than 1445 kj/mol d) more information is needed to answer this question.
When the second ionization energy of Mg is 1445 kj/mol, then the first ionization energy is less than 1445 kj/mol. Thus, (option b) less than 1445 kj/mol is the correct answer.
What is ionization energy?Ionization energy is the minimum amount of energy required to remove one mole of electrons from a mole of gaseous atoms or ions in the ground state (at zero degrees Kelvin).
The ionization energy of a given element increases as the nuclear charge or atomic number increases, indicating that the electrons are being held more tightly.
1. Ionization energy refers to the energy required to remove an electron from an atom or ion.
2. The first ionization energy is the energy needed to remove the first electron, while the second ionization energy is the energy needed to remove the second electron.
3. In general, the ionization energy increases as electrons are removed, because the remaining electrons are more strongly attracted to the positively charged nucleus.
4. Since the second ionization energy of Mg is 1445 kJ/mol, the first ionization energy must be less than this value, as it takes less energy to remove the first electron.
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of the following, the entropy of gaseous is the largest at 25ec and 1 atm. a) c2h2 b) h2 c) c2h6 d) ch4 e) c2h2
The entropy of gaseous H₂ (hydrogen gas) is the largest at 25°C and 1 atm. Option B is correct.
Entropy is a measure of the disorder or randomness of a system. In general, the entropy of a substance increases as it goes from a solid to a liquid to a gas. At the same temperature and pressure, the entropy of a substance is proportional to the number of particles in the system.
H₂ has the smallest molecular weight, which means that it has the greatest number of particles per unit volume compared to the other molecules. Therefore, it has the largest entropy at a given temperature and pressure.
Furthermore, H₂ is a diatomic gas, meaning that it has two atoms per molecule. Diatomic gases have more degrees of freedom than monoatomic gases, which also increases their entropy. C₂ H₂ (acetylene) is also a diatomic gas, but it has a larger molecular weight than H₂, so it has a lower entropy. In summary, the entropy of gaseous H₂ is the largest at 25°C and 1 atm due to its small molecular weight and diatomic nature. Option B is correct.
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calculate the volume percentage of each major component of the wet bone, based on the weight percentage, i.e. 9, 69, 22 wt% for water, mineral, and organic phase, respectively. assume the densities of the mineral, and organic phase are 3.16 and 1.03 g/cm3, respectively.
The volume percentage of each major component of wet bone is 9% water, 21.8% mineral, and 21.4% organic phase.
The first step is to calculate the total weight of wet bone, assuming a total weight of 100 grams:
Water: 9 wt% of 100 g = 9 g
Mineral: 69 wt% of 100 g = 69 g
Organic phase: 22 wt% of 100 g = 22 g
The next step is to calculate the volume of each component using their respective densities:
Volume of water = 9 g / 1 g/cm3 = 9 mL
Volume of mineral = 69 g / 3.16 g/cm3 = 21.8 mL
Volume of organic phase = 22 g / 1.03 g/cm3 = 21.4 mL
Finally, we can calculate the volume percentage of each component:
Volume percentage of water = (9 mL / 100 mL) x 100% = 9%
Volume percentage of mineral = (21.8 mL / 100 mL) x 100% = 21.8%
Volume percentage of organic phase = (21.4 mL / 100 mL) x 100% = 21.4%
Therefore, each main component of wet bone has a volume proportion of 9% water, 21.8% mineral, and 21.4% organic phase.
The calculation involves converting the weight percentages to actual weights and then determining the volume of each component based on their respective densities. The volume percentage is then calculated by dividing the volume of each component by the total volume of wet bone (which is assumed to be 100 mL). It is important to use the correct density values for each component to ensure accurate calculations. The volume percentages give us a better understanding of the relative contributions of each component to the overall structure of wet bone.
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aquatic sulfur is primarily: group of answer choices present as the amino acid cysteine present as elemental sulfur present as h2s present as dimethylsulfoniopropionate present as sulfate
Aquatic sulfur is primarily present as sulfate. Sulfate is the most abundant form of sulfur in seawater, accounting for up to 97 percent of the sulfur present.
Sulfate is important because it is used by microorganisms to perform a variety of biological processes. This includes energy production and the production of organic matter, which is important for supporting marine food webs. Sulfate can also be converted into other forms of sulfur by certain microorganisms.
For example, some bacteria can reduce sulfate to sulfide, which is toxic to most organisms but is used by some bacteria as an energy source. Other microorganisms can oxidize sulfide back to sulfate. Overall, sulfate is an important and abundant form of aquatic sulfur that plays a key role in many marine biological processes.
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a mixture containing 4.34 g of co2 and 3.08 g of ch4 has a total pressure of 1.03 atm . partial pressure of co2?
Partial pressure of CO2 in the mixture is 0.350 atm.
We need to use mole fraction of [tex]CO_{2}[/tex] to find the partial pressure of CO2 in the mixture
First calculate the moles of carbon dioxide and CH4 in the mixture. Now can use the molar mass of each gas. Then convert the given masses to moles.
moles of [tex]CO_{2}[/tex] = 4.34 / 44.01 = 0.0987 mol
moles of [tex]CH_{4}[/tex] = 3.08 / 16.04 = 0.192 mol
Now have to calculate the total moles of gas.
Total moles = moles of [tex]CO_{2}[/tex] + moles of CH4 = 0.0987 mol + 0.192 mol = 0.2907 mol
Now we will calculate the mole fraction of CO2,
mole fraction of [tex]CO_{2}[/tex] = moles of [tex]CO_{2}[/tex] / total moles = 0.0987 mol / 0.2907 mol = 0.3396
Finally, mole fraction to calculate the partial pressure of CO2
partial pressure of CO2 = mole fraction of CO2 x total pressure = 0.3396 x 1.03 atm = 0.350 atm
Therefore the partial pressure is 0.350 atm.
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An unknown gas diffuses 0.25 times as fast as He, What is the molecular mass of the
unknown gas?
The molecular mass of the unknown gas = 64g/mol
The rate of diffusion of a gas is inversely proportional to the square root of its molecular mass. Let the molecular mass of the unknown gas be M. Then, we have:
Rate of diffusion of unknown gas / Rate of diffusion of He = sqrt(MHe / M)
Since the rate of diffusion of the unknown gas is 0.25 times that of He, we can write:
0.25 = sqrt(MHe / M)
Squaring both sides, we get:
0.0625 = MHe / M
M = MHe / 0.0625
The molecular mass of He is approximately 4 g/mol. Substituting this value, we get:
M = 4 / 0.0625
M = 64 g/mol
Therefore, the molecular mass of the unknown gas is approximately 64 g/mol.
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a slight decrease in first ionization energy upon going from p to s can be attributed to what factor?
A slight decrease in first ionization energy upon going from p to s can be attributed to a screening effect or increased electron-electron repulsion.
What is ionization energy?
The energy required to remove an electron from a gaseous atom or ion is known as ionization energy. The amount of energy required to remove the most loosely bound electron from the gaseous atom or ion is referred to as the first ionization energy. Ionization energy is a physical property that varies with the atomic or ionic radius, the ionization potential, and the degree of electron-electron interaction.
A slight decrease in first ionization energy upon going from p to s can be attributed to what factor?
A screening effect or increased electron-electron repulsion is the factor that can be attributed to a slight decrease in first ionization energy when moving from p to s. As we go from left to right on the periodic table, the ionization energy rises. It occurs because the effective nuclear charge, or the number of protons in the nucleus minus the number of electrons between the nucleus and the valence electron, increases as we go from left to right.The electrons in the inner shells shield the valence electrons from the nucleus's positive charge. The first ionization energy of atoms with similar valence electron configuration decreases as we go down the periodic table. The electrons in the outermost orbital are further away from the nucleus and are more shielded from the attractive power of the nucleus as we go down the periodic table. As a result, less energy is required to remove the valence electron.
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agi , baf2 , and agbr are all sparingly soluble salts. which of these salts will be more soluble in an acidic solution than in water?
sparingly soluble salts derived from weak acids tend to be more soluble in an acidic solution.
This is because the added H+ ions (from a strong acid such as HCl) react with the anions of the salts to form weak acids, which decrease the ion product and shift the equilibrium to favor more dissolution. Therefore, out of the three salts you mentioned, BaF_2 will be more soluble in an acidic solution than in water. This is because F- is the conjugate base of HF, a weak acid, while Ag+ and Br- are the conjugate acids of strong bases (AgOH and KOH).
The solubility product constant (Ksp) of BaF_2 is a measure of how much BaF_2 can dissolve in water at a given temperature. It is defined as the product of the concentrations of Ba^2+ and F^- ions in equilibrium with solid BaF_2. According to Bartleby1, the solubility product constant for BaF_2 is 1.0 x 10^-6 at 25°C. This means that only a very small amount of BaF_2 can dissolve in water at this temperature.
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what is the concentration of h in a 0.025 m hcl solution? group of answer choices 0.010 m 0.013 m 0.025 m 0 0.050 m
Answer:
0.025
Explanation:
The concentration is 0.025 since that is the molarity of the solution. Molarity is mol/L . Molarity is the concentration of the HCl
Answer is 0.025
The concentration of H+ in a 0.025 M HCl solution is 0.025 M, since HCl is a strong acid and dissociates completely in water to form H+ and Cl-.
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what is the retention factor for the yellow spot? photo shows: red spot (0.3 cm), yellow spot (1.5 cm), green spot (4.8 cm), blue spot (5.1 cm), solvent front (5.8 cm)
The retention factor for the yellow spot is 0.2586.
Rf = Distance traveled with the aid of the compound / Distance traveled by the solvent the front
Rf = 1.5 cm / 5.8 cm = 0.2586
Retention factor (Rf) is a term used in chromatography, a laboratory technique used to separate and analyze mixtures of compounds. Rf is a dimensionless quantity that describes the migration of a particular compound relative to the solvent front in a chromatographic system.
In a typical chromatographic separation, the sample mixture is placed on a stationary phase, which is usually a solid or liquid that is immobilized on a solid support. The stationary phase is then contacted with a mobile phase, which is a liquid or a gas that flows over the stationary phase, carrying the sample compounds with it. The Rf value for a given compound is determined by dividing the distance the compound travels up the stationary phase by the distance the solvent front travels up the same phase.
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calculate the ph of a buffer solution obtained by dissolving 30.0 g of kh2po4(s) and 49.0 g of na2hpo4(s) in water and then diluting to 1.00 l.
The pH of the buffer solution is approximately 7.65.
To calculate the pH of a buffer solution, first determine the concentration of [tex]KH_{2} PO_{4}[/tex] and [tex]Na_{2} HPO_{4}[/tex].
Calculate moles of [tex]KH_{2} PO_{4}[/tex] and [tex]Na_{2} HPO_{4}[/tex]:
- [tex]KH_{2} PO_{4}[/tex]: (30.0 g) / (136.09 g/mol) = 0.2203 mol
- [tex]Na_{2} HPO_{4}[/tex]: (49.0 g) / (141.96 g/mol) = 0.3451 mol
Calculate concentrations in the 1.00 L solution:
- [[tex]KH_{2} PO_{4}[/tex]] = 0.2203 mol / 1.00 L = 0.2203 M
- [[tex]Na_{2} HPO_{4}[/tex]] = 0.3451 mol / 1.00 L = 0.3451 M
Use the Henderson-Hasselbalch equation:
pH = pKa + log ([A-]/[HA])
- For [tex]H_{2} PO_{4}[/tex]-/HPO4²-, the pKa = 7.21.
- pH = 7.21 + log (0.3451/0.2203)
Calculate the pH:
- pH ≈ 7.21 + 0.438 = 7.65
The pH of the buffer solution is approximately 7.65.
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what is the chemical Name of H3P(aq)
H3P(aq) is the chemical formula for phosphoric acid, which is a mineral acid commonly used in the production of fertilizers and food additives.
What is Chemical Name?
A chemical name is the name given to a specific chemical compound that describes the type and number of atoms present in the compound. It is different from a chemical formula, which uses chemical symbols and subscripts to indicate the number and type of atoms in a molecule or formula unit of a compound.
Phosphoric acid (H3P) is a colorless, odorless, and highly soluble inorganic acid that contains one phosphorus atom, three hydrogen atoms, and four oxygen atoms. In aqueous solution, it dissociates to produce hydrogen ions (H+) and phosphate ions (H2PO4- and HPO42-). The chemical formula H3P(aq) is used to indicate that the phosphoric acid is dissolved in water to form an aqueous solution.
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how does paraquat damage human tissue?it generates oxygen radicals using electrons diverted from complex i of the respiratory chain.it competes with ferredoxin for electrons from the psi reaction center.electrons attached to paraquat are used to reduce nitrogen, generating highly reactive nitrogen radicals.it interferes with psi function.
Paraquat damages human tissue by generating oxygen radicals using electrons diverted from complex I of the respiratory chain.
Paraquat is known to damage human tissue by generating oxygen radicals using electrons diverted from complex I of the respiratory chain, competing with ferredoxin for electrons from the PSI reaction center, reducing nitrogen by using electrons attached to paraquat, and interfering with PSI function. Paraquat is a toxic herbicide that affects the respiratory system, lungs, kidneys, liver, and other organs, and it is linked to Parkinson's disease. Paraquat causes damage to cells by generating oxygen radicals using electrons diverted from complex I of the respiratory chain, competing with ferredoxin for electrons from the PSI reaction center, reducing nitrogen by using electrons attached to paraquat, and interfering with PSI function. The toxicity of Paraquat is related to the continuous cycle of oxidants generated by paraquat in cells, which causes tissue damage and cell death.
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a construction company used asbestos on many job sites over the years. asbestos is a(n) group of answer choices widely used dye. pesticide. radioactive material. environmental carcinogen.
Asbestos is not a widely used dye, pesticide, or radioactive material. As mentioned earlier, asbestos is a group of naturally occurring fibrous minerals that were widely used in construction and insulation materials due to their heat resistance and durability.
However, prolonged exposure to asbestos fibres can lead to serious health problems, including lung cancer, mesothelioma, and asbestosis. These health risks are due to the fact that asbestos fibres are small and can be inhaled, causing damage to the lungs and respiratory system. Therefore, asbestos is classified as an environmental carcinogen, which means it is a substance that can cause cancer or promote the growth of cancer cells in the environment.
The construction company's use of asbestos on job sites could potentially have exposed workers and others to these health risks, which is why the use of asbestos has been heavily regulated and phased out in many countries around the world.
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consider the following oxides: so2 , p2o5 , mgo , cl2o , n2o5 . how many are expected to form acidic solutions in water?
Metal oxides form basic solutions while nonmetal oxides form acid solutions. SO₂, P₂O₅, Cl₂O, and N₂O₅ oxides are predicted to generate acidic solutions.
The periodic table's left side is where metals are located. Oxides are created when metals and oxygen react. Metal oxides disintegrate in water to create basic solutions. The oxides that should result in the formation of a basic solution are MgO,
Oxygen and nonmetals can also react to generate oxides. Nonmetal oxides dissolve in water to produce acids. Hence, SO₂, P₂O₅, Cl₂O, and N₂O₅ oxides are predicted to generate acidic solutions.
Metal oxides have a basic character, whereas non-metal oxides have an acidic nature. Metal oxides are basic because when they dissolve in water, they produce salt and water. Metal oxides include OH⁻. Ions are thus fundamental. H⁺ ions are found in non-metal oxides like sulphur dioxide, which dissolve in water to create acidic solutions.
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at 15 degress celcius, the water ionization constant, k2 is 4.5 * 10^-15. what is th h3o concentration in neutral water at this temperature
The H3O+ concentration of neutral water at 15 degrees Celsius is 10^-7 M.
As per the given information, the water ionization constant k2 is 4.5 × 10^-15 at 15 degrees Celsius. The H3O+ concentration of neutral water at this temperature can be determined using the formula:
Kw = [H3O+][OH-]Here, Kw represents the ionic product of water which is equal to 1.0 × 10^-14 at 15 degrees Celsius (which can be looked up in a table).
Since we know that pure or neutral water has an equal concentration of H3O+ and OH- ions, we can assume that the concentration of OH- ions is also 1.0 × 10^-7 M.
Therefore, we can substitute the values in the equation to obtain:
[H3O+][OH-] = 1.0 × 10^-14[H3O+] [1.0 × 10^-7]
= 1.0 × 10^-14[H3O+]
= 1.0 × 10^-7 ÷ 1.0 × 10^-14[H3O+]
= 10^7The H3O+ concentration of neutral water at 15 degrees Celsius is 10^-7 M (or 0.0000001 M).
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a mineral deposit along a strip of length 1 cm has density g/cm for . calculate the total mass of the deposit. your answer must include units.
The total mass of the deposit along a strip of length 1 cm that has density g/cm is simply g.
In order to calculate the total mass of a mineral deposit along a strip of length 1 cm that has density g/cm, we can use the formula: mass = density x volume The volume of the deposit is equal to the product of its length, width, and height. Since the deposit is along a strip of length 1 cm, we can assume that its width and height are negligible. Therefore, the volume of the deposit is approximately 1 cm³.
Substituting the density of the deposit in place of g/cm³, we can rewrite the formula as: mass = (density in g/cm³) x (volume in cm³)mass = g x 1 cm³mass = g To express the mass of the deposit in units of grams (g), we must know the value of the density in g/cm³. Once we know this value, we can multiply it by 1 cm³ to obtain the mass in grams.
For example, if the density of the deposit is 2 g/cm³, then the mass of the deposit is: mass = 2 g/cm³ x 1 cm³mass = 2 g Therefore, the total mass of the mineral deposit along a strip of length 1 cm that has density g/cm is simply g.
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when isopropylbenzene (cumene) is treated with nbs and irradiated with uv light, only one product is obtained. propose a mechanism and explain why only one product is formed.
This leads to the formation of p-bromoisopropylbenzene, which is the only product observed in this reaction.
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How do we classify a solution that has many ions in solution and turns pH paper orange?
A solution that has many ions in solution and turns pH paper orange is likely to be an acidic solution with a pH between 3 and 5.
The presence of many ions in solution indicates that the solution is likely to be a strong electrolyte, meaning that it contains a high concentration of ions that dissociate completely in water.
This could be due to the presence of a strong acid or a strong salt in the solution. The orange color on the pH paper indicates that the solution has a pH in the acidic range, which is consistent with the high concentration of H+ ions in an acidic solution.
Therefore, the solution can be classified as a strong acidic solution.
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What are the similarities between structural models and Lewis dot structures?
Answer:
A Lewis dot structure is like a simplified Bohr-Rutherford model. The Lewis Dot diagram contains the element symbol with dots representing electrons. The only electrons shown are those on the outer energy level or valence electrons.
How many moles of NaOH are contained in a 65.0 mL of a 2.20 M solution of NaOH?
Answer:.143 moles
Explanation:
Explanation:
We're going to use this equation
n
=
M
⋅
V
M meaning our molarity, n meaning our moles involved, and v meaning our volume in Liters.
n
=
2.20
⋅
.065
n=.143 moles.
Answer:
there are 0.143 moles of NaOH in 65.0 mL of a 2.20 M solution of NaOH.
Explanation:
To calculate the number of moles of NaOH in a given solution, we need to use the formula:
moles = concentration (in M) x volume (in L)
We are given the concentration of NaOH solution as 2.20 M and the volume as 65.0 mL. However, we need to convert the volume to liters before we can use the formula.
65.0 mL = 65.0/1000 L = 0.065 L
Now we can plug in the values in the formula:
moles = 2.20 M x 0.065 L
moles = 0.143 moles
Therefore, there are 0.143 moles of NaOH in 65.0 mL of a 2.20 M solution of NaOH.