Answer:
Explanation:
When Iron is dipped in Aluminium Chloride, a redox reaction occurs. Basically iron reacts with Chloride ion and forms a solid precipitate of Aluminium.
End result :Iron (II) Chloride forms and Aluminium forms the precipitate
The temperature of 17.0 L of carbon dioxide is lowered from 38°c to 5°c. What is the final volume?
4.68L is the final volume.
The volume of a gas is inversely proportional to its temperature when pressure is held constant. This means that when the temperature of the gas is decreased, its volume will increase.
Therefore, the final volume of the 17.0 L of carbon dioxide will be greater than 17.0 L after it is cooled from 38°C to 5°C.
The equation to calculate the final volume is:
[tex]V2 = V1 * (\frac{T2}{T1})[/tex]
where T1 is the starting temperature, T2 is the ending temperature, V1 is the starting volume, and V2 is the finished volume.
Using this equation, the final volume of the carbon dioxide can be calculated as:
[tex]V2 = 17.0 L * (\frac{5\°C}{38\°C}) \\V2= 4.68 L[/tex]
Therefore ,The Final volume is 4.68L
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Rank the compounds NH3, CH4 and PH3 in order of increasing boiling point.
a) NH3 < PH3 < CH4
b) CH4 < NH3 < PH3
c) NH3 < CH4 < PH3
d) CH4 < PH3 < NH3
e) PH3 < NH3 < CH
The order of increasing boiling point for NH₃, CH₄, and PH₃ is (option C)NH₃ < CH₄ < PH₃. This is due to the intermolecular forces, which increase with increasing molecular weight and polarity.
The boiling point of a compound is primarily determined by its intermolecular forces, which are in turn dependent on its molecular structure and the types of atoms present. The strengths of the intermolecular forces increase with increasing molecular weight and polarity.
Among the given compounds NH₃, CH₄, and PH₃, NH₃ and PH₃ are polar, while CH₄ is nonpolar. This implies that NH₃ and PH₃ are capable of forming hydrogen bonds, which are stronger than the van der Waals forces that hold CH₄ molecules together.
Therefore, the order of increasing boiling point is:
c) NH₃ < CH₄ < PH₃
Hence, option (c) is the correct answer.
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Calculate the ratio of the velocity of helium atoms to the velocity of chlorine molecules at the same temperature
At the same temperature, the ratio of helium atom to chlorine molecule velocity is roughly 2.98.
The ratio of the velocity of helium atoms to the velocity of chlorine molecules at the same temperature can be calculated using the root-mean-square (rms) velocity formula. The rms velocity is the square root of the average of the squared velocities of the particles in a gas.
The rms velocity of a gas can be calculated using the equation:
[tex]v_r_m_s[/tex] = √((3kT)/(M))
where k is the Boltzmann constant, T is the temperature in Kelvin, and M is the molar mass of the gas.
For helium, the molar mass (M) is 4.003 g/mol, and for chlorine, the molar mass is 35.45 g/mol.
Assuming both gases are at the same temperature, we can cancel out T from the equation. Thus, we have:
([tex]v_r_m_s[/tex])_He/([tex]v_r_m_s[/tex])_Cl = √(M_Cl/M_He)
Substituting the values, we get:
([tex]v_r_m_s[/tex])_He/([tex]v_r_m_s[/tex])_Cl = √(35.45 g/mol / 4.003 g/mol)
= √(8.862)
= 2.98
Therefore, the ratio of the velocity of helium atoms to the velocity of chlorine molecules at the same temperature is approximately 2.98.
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What volume, in ml, of concentrated .02 M NaOH is required to prepare 2,000mL of a.01 M solution?
We need 1,000 mL of concentrated 0.02 M NaOH to prepare 2,000 mL of 0.01 M solution.
To calculate the volume of concentrated NaOH required to prepare 2,000 mL of 0.01 M solution, we need to use the formula:
C1V1 = C2V2
where C1 is the concentration of the concentrated NaOH, V1 is the volume of the concentrated NaOH, C2 is the desired concentration of the diluted solution (0.01 M in this case), and V2 is the final volume of the diluted solution (2,000 mL in this case).
We can rearrange the formula to solve for V1:
V1 = (C2 * V2) / C1
Plugging in the values, we get:
V1 = (0.01 M * 2,000 mL) / 0.02 M
V1 = 1,000 mL
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solid calcium carbonate, caco3 , is able to remove sulphur dioxide from waste gases by the reaction (balanced as written): caco3 s 2 other reactants ------
Solid calcium carbonate (CaCO3) is capable of removing sulfur dioxide (SO2) from waste gases through the following reaction:CaCO3 (s) + 2SO2 (g) → CaSO3 (s) + CO2 (g)
This reaction is balanced as written, so there is no need to balance it further. The reaction can be used to remove sulfur dioxide from waste gases by passing the gases through a bed of solid calcium carbonate. The sulfur dioxide reacts with the calcium carbonate to form calcium sulfite (CaSO3) and carbon dioxide (CO2).The calcium sulfite can then be further oxidized to form calcium sulfate (CaSO4), which is a useful industrial chemical. This process is known as flue gas desulfurization and is commonly used in coal-fired power plants to reduce emissions of sulfur dioxide.
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liquid octane ch3ch26ch3 reacts with gaseous oxygen gas o2 to produce gaseous carbon dioxide co2 and gaseous water h2o. what is the theoretical yield of water formed from the reaction of 2.3g of octane and 6.2g of oxygen gas? be sure your answer has the correct number of significant digits in it. g
When 2.3 g of octane (CH3CH2CH3) react with 6.2 g of oxygen gas (O2), the theoretical yield of water (H2O) produced is 3.32 g.
The balanced equation for this reaction is:
CH3CH2CH3 + 3 O2 -> 2 CO2 + 3 H2O
To calculate the theoretical yield of water formed, we need to know the molar mass of octane, oxygen, carbon dioxide, and water.
The molar mass of octane is (12.011 + 1.00794*2 + 15.9994*3 = 58.0966 g/mol).
The molar mass of oxygen is (2*15.9994 = 31.9988 g/mol).
The molar mass of carbon dioxide is (12.011 + 2*15.9994 = 44.0094 g/mol).
The molar mass of water is (2*1.00794 + 15.9994 = 18.01528 g/mol).
Now we can calculate the number of moles of octane and oxygen that are needed in the reaction.
2.3 g of octane is equal to (2.3/58.0966 = 0.0397 mol).
6.2 g of oxygen is equal to (6.2/31.9988 = 0.1937 mol).
The ratio of moles of octane to moles of oxygen is 0.0397:0.1937. We can use the mole ratio to calculate the moles of water formed:
0.1937 x 3 = 0.5811 mol of water
To convert from moles of water to grams of water, we multiply the number of moles of water by the molar mass of water:
0.5811 mol x 18.01528 g/mol = 3.32 g of water
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if the size of a radioactive sample is doubled, what happens to the activity of the sample in bq ? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer. resethelp the activity of the sample blank. the number of blank per second blank to the number of blank g
Rewriting the above question in a clearly manner,
"If the size of a radioactive sample is doubled, what happens to the activity of the sample in Becquerel (Bq)? Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.
The activity of the sample ________.
The number of ________ per second ________ to the number of ________ gram(s)."
ANSWER: The activity of the sample increases.
The number of decays per second doubles to the number of atoms/gram.
What is Radioactive decay?Radioactive decay is the process of spontaneous decay of a nucleus into another nucleus.
In a radioactive decay, the parent nuclide disintegrates into a different daughter nuclide while emitting an alpha particle, beta particle, or gamma rays.
When radioactive decay occurs, radiation is emitted as particles or electromagnetic radiation. The amount of radioactive substance in a sample, as well as the radioactive isotopes present in it, determine the activity of a radioactive sample. This is the rate at which radiation is emitted by the sample.
In a nuclear reaction, the activity of a radioactive substance is expressed in Becquerel (Bq). This is the amount of radioactive substance that decays in one second. One Bq equals one radioactive decay per second.
In summary, if the size of a radioactive sample is doubled, the activity of the sample in Bq is also doubled.
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how is o2 transported in the blood? question 12 options: as bicarbonate dissolved in the plasma only as a dissolved gas in the plasma only on hemoglobin on hemoglobin and as a dissolved gas in the plasma
[tex]O_2[/tex]is transported in the blood through hemoglobin and as a dissolved gas in the plasma.
Oxygen molecules bind to hemoglobin, a protein in red blood cells, forming a complex called oxyhemoglobin.
Oxygen transport is the process by which oxygen is distributed from the respiratory system to cells in the body. It's essential for cellular metabolism and respiration. Oxygen transport is accomplished via the bloodstream, which carries oxygen from the lungs to the cells and removes carbon dioxide from the cells, transporting it back to the lungs to be exhaled.
When oxygen is inhaled into the lungs, it diffuses across the alveolar membranes and into the bloodstream. Oxygen molecules then bind to hemoglobin molecules in red blood cells, forming oxyhemoglobin. Hemoglobin's structure enables it to bind oxygen molecules reversibly.
The capacity of hemoglobin to bind oxygen is determined by the partial pressure of oxygen in the surrounding environment, as well as the pH and temperature of the environment. The majority of the oxygen in the blood is transported by hemoglobin.
However, some oxygen is also dissolved in the plasma, where it's transported to tissues that aren't well-perfused with blood or that need a rapid oxygen supply. In the plasma, oxygen is carried in the form of dissolved gas.
In the plasma, oxygen transport happens through the bicarbonate ion ([tex]HCO_3^-[/tex]) buffering system. Carbon dioxide ([tex]CO_2[/tex]) produced by cells is carried in the bloodstream to the lungs, where it diffuses across the alveolar membranes and into the airway to be exhaled. As [tex]CO_2[/tex] is removed from the bloodstream, [tex]HCO_3^-[/tex] is converted back into [tex]CO_2[/tex] and water, increasing the oxygen saturation in the blood.
Therefore we can say oxygen ([tex]O_2[/tex]) is transported in the blood primarily by binding to hemoglobin molecules in red blood cells and also to a lesser extent as a dissolved gas in the plasma.
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Which choice identifies the correct limiting reactant and correct reasoning?
4Na + O₂ → 2Na₂O
5.43 moles Na produces 169 g Na2O.
4.25 moles O2 produces 527 g Na2O.
A. Na because it has the higher starting mass
B. Na because it has the lower yield
C. O₂ because it has the lower starting mass
D. O₂ because it has the higher yield
The balanced chemical equation for the reaction is 4Na + O₂ → 2Na₂O. This means that for every 4 moles of sodium (Na) and 1 mole of oxygen (O₂) that react, 2 moles of sodium oxide (Na₂O) are produced.
To determine the correct answer, we need to use stoichiometry to calculate the theoretical yield of Na₂O based on the amount of Na and O₂ present in each scenario. We can then compare the calculated yield to the given yield of 169 g and 527 g to see which starting material (Na or O₂) produces a lower yield.
A. To calculate the theoretical yield of Na₂O based on 5.43 moles of Na:
5.43 moles Na x (2 moles Na₂O / 4 moles Na) x (62 g Na₂O / 1 mole Na₂O) = 168.78 g Na₂O
The calculated yield of Na₂O based on 5.43 moles of Na is very close to the given yield of 169 g. Therefore, we can conclude that Na is not the correct answer.
B. To calculate the theoretical yield of Na₂O based on 4.25 moles of O₂:
4.25 moles O₂ x (2 moles Na₂O / 1 mole O₂) x (62 g Na₂O / 1 mole Na₂O) = 527.25 g Na₂O
The calculated yield of Na₂O based on 4.25 moles of O₂ is very close to the given yield of 527 g. Therefore, we can conclude that O₂ is not the correct answer.
C. Since Na is not the correct answer and O₂ is not the correct answer, the only option left is C. Therefore, the correct answer is O₂ because it has the lower starting mass.
If 26 grams of N2 are present, how many moles of NF3 will be produced?
The balanced chemical equation for the reaction between N2 and F2 to produce NF3 is N2(g) + 3F2(g) → 2NF3(g). The molar mass of N2 is 28.02 g/mol. Therefore, 26 g of N2 is equal to 0.93 moles of N2.
What is the ratio of moles of NH3 to moles of N2?The preceding balanced equation clearly shows that 2 moles of ammonia are created for every 1 mole of nitrogen. This indicates that the reaction's N2 to NH3 mole ratio is 1 to 2.
What number of moles of NH3 will be produced?There are 14 moles of NH3 produced. The balanced chemical equation must first be written. Then use the unitary approach to fix the issue. Now, the mass of ammonia is determined using the following formula.
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Which statement below is true about vaporization?
A. Vaporization occurs when liquid changes to a solid.
B. Vaporization occurs when particles lose energy and become sold.
C. Vaporization occurs when there is an decrease in heat.
D. Vaporization occurs when liquid particles gain energy and "fly away" into a gas.
Answer:
Explanation:
D. Vaporization occurs with liquid particles gain energy and "fly away" into a gas.
Think of when you're boiling something on the stove.
Different forms of the same element with different numbers of neutrons are called:
a. molecules
b. compounds
c. isotopes
d. lattices
Different forms of the same element with different numbers of neutrons are called isotopes.
Isotopes are a sort of atom, the smallest unit of matter that retains every one of the chemical properties of a component. Isotopes are forms of chemical components with specific properties.
Every component is distinguished by the number of protons, neutrons, and electrons that it possesses. The atoms of every chemical component have a characterizing same number of protons and electrons, yet - vitally - not neutrons, whose numbers can shift.
Atoms with the same number of protons yet various numbers of neutrons are called isotopes. They share almost the same chemical properties, yet contrast in mass and therefore in physical properties. There are stable isotopes, which don't emanate radiation, and there are unstable isotopes, which in all actuality do transmit radiation. The latter are called radioisotopes.
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how to determine which direction the equilibrium will shift with the addition of a new ionic compound
The direction of equilibrium shift upon addition of a new ionic compound depends on the nature of the compound being added and the equilibrium constant (K) of the reaction. Le Chatelier's principle is a useful tool to predict the direction of equilibrium shift.
If an ionic compound is added to a reaction mixture, it will dissociate into its respective ions. If the added ions are the same as the ones present in the reaction, they will not affect the equilibrium position. However, if the added ions are different, they can affect the equilibrium position by increasing or decreasing the concentration of one or more reactants or products.
If a new compound is added to a reaction, and it contains an ion that is common to one side of the equilibrium, then the equilibrium will shift towards the opposite side. If the added compound contains an ion that is unique to one side of the equilibrium, then the equilibrium will shift towards that side.
Additionally, if the added compound reacts with one of the reactants or products to form a new compound, the equilibrium will shift to restore the original concentrations of the reactants and products. The extent of the shift will depend on the relative magnitudes of the equilibrium constants of the original and new reactions.
Overall, the direction of equilibrium shift upon addition of a new ionic compound is dependent on the specific conditions of the reaction, and can be predicted using Le Chatelier's principle.
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solution of a monoprotic acid was titrated with NaOH, What is the molar ratio of the acid to the base? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a 1:1 b 1:2 с It is impossible to determine from the information given. d :1 2:1
The molar ratio of the acid to the base in this scenario would be 1:1, option a. this is because a monoprotic acid only has one acidic hydrogen ion to donate. hence, on this titration, the stoichiometric ratio of acid to base is 1:1.
while an acid is dissolved in water, it simplest has one acidic hydrogen ion to offer, making it a monoprotic acid. This shows that one mole of the acid can give one mole of H+ ions to a base or any other species. Acetic acid, nitric acid, and hydrochloric acid are some examples of monoprotic acids (CH3COOH). because of their ability to offer actual manage over the amount of acid or base injected, these acids are frequently utilized in an expansion of chemical reactions, along with acid-base titrations. The dissociation constant, Ka, which measures the acid's electricity, can be used to give an explanation for how a monoprotic acid behaves in answer.
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methanoic acid has ka = 1.6 x 10^-4. calculate the ph of the final solution when 23.90 ml of .100 m sodium hydroxide is added to 25.00 ml of .100 m methanoic acid
The pH of the final solution is approximately 3.87. When 23.90 mL of 0.100 M sodium hydroxide is added to 25.00 mL of 0.100 M methanoic acid with a Ka value of 1.6 x 10^-4, we can calculate the pH of the final solution by first finding the moles of acid and base:
moles of methanoic acid = 25.00 mL × 0.100 M = 2.500 mmol
moles of sodium hydroxide = 23.90 mL × 0.100 M = 2.390 mmol
Now, we can find the moles of methanoic acid remaining after the reaction:
moles of methanoic acid remaining = 2.500 mmol - 2.390 mmol = 0.110 mmol
As the reaction between methanoic acid and sodium hydroxide is a 1:1 reaction, we will have 0.110 mmol of methanoic acid and 0 mmol of sodium hydroxide remaining. Next, we can calculate the concentration of the remaining methanoic acid in the solution:
volume of solution = 25.00 mL + 23.90 mL = 48.90 mL
concentration of methanoic acid = 0.110 mmol / 48.90 mL = 0.00225 M
Now, we can use the Ka value to find the concentration of H3O+ ions in the solution:
Ka = [H3O+][A-] / [HA]
1.6 x 10^-4 = [H3O+][0.00225 - H3O+] / [0.00225]
Solving for H3O+ concentration, we get:
[H3O+] ≈ 1.35 x 10^-4 M
Finally, we can calculate the pH of the final solution using the H3O+ concentration:
pH = -log10[H3O+]
pH ≈ -log10(1.35 x 10^-4)
pH ≈ 3.87
Therefore, the pH of the final solution is approximately 3.87.
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Which molecule is bound to hemoglobin when hemoglobin is in the R state? a. Fe3+ b. CO2 CO2 c. 2,3-bisphosphoglycerate
The molecule that is bound to hemoglobin when it is in the R state is 2,3-bisphosphoglycerate (2,3-BPG). The correct option is C.
2,3-BPG is a phosphate-containing compound that binds to the hemoglobin and reduces the affinity of oxygen to hemoglobin, making it easier for oxygen to leave the blood and enter the tissues. This helps the body maintain a healthy balance of oxygen levels.
2,3-BPG is released from red blood cells and enters the bloodstream, where it binds to hemoglobin, causing the hemoglobin to shift to its R state. In this state, the hemoglobin has a lower affinity for oxygen, allowing more oxygen to be released from the hemoglobin and enter the tissues.
In the absence of 2,3-BPG, hemoglobin binds to oxygen more tightly, making it harder for oxygen to leave the bloodstream and enter the tissues. Therefore, 2,3-BPG is essential for proper oxygen transport and tissue oxygenation.
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if the ph of an aqueous solution at 298 k is 4.31, what is the concentration of hydroxide ions in the solution?
If the pH of an aqueous solution at 298 K is 4.31, the concentration of hydroxide ions in the solution is 5.01 x 10^-11 M.
The pH and pOH of a solution are related to the concentration of hydrogen ions (H+) and hydroxide ions (OH-) through the following equations: pH = -log[H+]pOH = -log[OH-]pH + pOH = 14For a neutral solution, [H+] = [OH-], and therefore pH = pOH = 7. For an acidic solution, [H+] > [OH-], and for a basic solution, [H+] < [OH-].To determine the concentration of hydroxide ions in the solution, we can use the relationship between pH and pOH:pH + pOH = 14pOH = 14 - 4.31 = 9.69Now, we can use the equation: pOH = -log[OH-]9.69 = -log[OH-][OH-] = 5.01 x 10^-11 M
Therefore, the concentration of hydroxide ions in the solution is 5.01 x 10^-11 M.
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Find the mass, in grams, of 2.80 L CO2 at STP
Find the mass, in grams, of 15.0 mL SO2 at STP
The mass of 15.0 mL SO2 at STP is 0.0375 grams.
What is Mass?
Mass is a measure of the amount of matter in an object or substance. It is usually measured in grams (g) or kilograms (kg). Mass is a scalar quantity, meaning it has only magnitude and no direction. It is different from weight, which is the force of gravity acting on an object with mass.
For both problems, we can use the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature in Kelvin. At STP, pressure is 1 atm and temperature is 273 K.
For the first problem, we can use the molar volume of a gas at STP, which is 22.4 L/mol, to find the number of moles of CO2:
2.80 L CO2 x (1 mol CO2 / 22.4 L CO2) = 0.125 mol CO2
Then, we can use the molar mass of CO2, which is 44.01 g/mol, to find the mass:
0.125 mol CO2 x 44.01 g/mol = 5.50 g CO2
Therefore, the mass of 2.80 L CO2 at STP is 5.50 grams.
For the second problem, we need to convert the volume from milliliters to liters:
15.0 mL SO2 = 0.0150 L SO2
Then, we can use the ideal gas law to find the number of moles of SO2:
PV = nRT
n = (PV) / RT
n = (1 atm)(0.0150 L) / (0.0821 Latm/molK)(273 K) = 5.86 x [tex]10^{-4}[/tex]mol SO2
Finally, we can use the molar mass of SO2, which is 64.06 g/mol, to find the mass:
5.86 x [tex]10^{-4}[/tex]mol SO2 x 64.06 g/mol = 0.0375 g SO2
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Molecules for N2(g) + H2(g) NH3(g)
The balanced formula is therefore N 2 (g) + 3 H (g) 2 NH 3 (g).
N2 g)+ H g) NH3 g is what kind of reaction?In the example process, hydrogen and nitrogen combine to form ammonia. It is thus a combination reaction as it is known that this sort of reaction is referred to as a combination reaction when two molecules join to generate a new chemical.
What is the perfectly aligned for N2, H2, and NH3?N2 (g) + 3H2 (g) 2NH3 is the balanced chemical formula for N2 + H2 + NH3 (g). The rule of mass conservatism may be used to attain this by duplicating the atoms across the product and reaction sides.
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what is the mass of this tiny bubble of dry air? molecular masses are 28 for nitrogen and 32 for oxygen.
The mass of the tiny bubble of dry air containing 78% N₂ and 22 % O₂ is 28.88 g/mol.
The molecular masses of N₂ and O₂ are 28 g/mol and 32 g/mol respectively.
Tiny bubbles found in dry air is the air inside a solid, liquid or surrounded by a colloid within a fluidic environment.
The approximate molecular mass of dry air is calculated as
= [molecular mass of N₂ × mass percentage of N₂] + [molecular mass of O₂× mass percentage of O₂] / mass percent of N₂ + mass percent of O₂
=[28×78]+[32×22]/78 +22
=28.88 g/mol
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I'LL MARK BRAINLIEST AND VOTE ON ALL YOUR PREVIOUS ANSWERS IF YOU GET THIS RIGHT
Predict whether the entropy would increase or decrease in the reaction KCl(s) gives K+(aq) + Cl–(aq). Explain your answer.
Answer:
entropy refers randomness
since solid objects' particles have less randomness
ENTROPY would increase is the reaction
when will a reaction be spontaneous if the change in enthalpy is exothermic and the system is getting more disordered?
The change in entropy is always negative and also the reaction is always spontaneous if the reaction is exothermic (H is low) and the entropy S is positive (greater disorder).
What is change in enthalpy in chemistry?The difference in enthalpy between the reactants and products is measured by the enthalpy shift of a reaction. The energy required to build new chemical bonds and break existing ones are what define a system's enthalpy.
How is the change in enthalpy of a reaction calculated?By deducting the total enthalpies of every one of the reactants from the total enthalpies of the products, the response enthalpy is determined. According to mathematics, tH is equal to the sum of the entropies of the reactants and the product.
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Image attached below confused
This solution has a pH of 7. As hydrogen and hydroxide ions are present in equal amounts in a pH 7 solution, it is neutral.
Why is point 7 on the pH scale considered neutral rather than point 0?Atoms bearing an electric charge, such the hydrogen atom with charge H+, which has a value of 1, are known as ions. Even in pure water, ions frequently appear as a result of chance occurrences (producing some H+ and OH- ions).
We use the following formula to determine the pH of the solution:
pH = -log[H+]
where [H+] represents the number of hydrogen ions present in the solution.
Substituting the given concentration [H+] = 1.0 x 10⁻⁷ mol/L into the formula, we get:
pH = -log(1.0 x 10⁻⁷)
= 7
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10.
Given the following reaction
Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)
If 1.00 g of Ca reacts with 1.00 g HCI and 1.21 g CaCl2 are produced, what is the theoretical yield, the percent
yield and the limiting reactant?
a. 2.77 g, 43.7%, Ca limiting
b. 2.77 g, 79.5%, HCI limiting
c. 1.52 g, 43.7%, Ca limiting
d. 1.52 g, 79.5% HCI limiting
e. 2.77g, 54.9%, Ca limiting
f. 1.52 g, 54.9%, HCI limiting
The correct answer is (d) 1.52 g, 79.5%, HCI limiting. The theoretical yield is the amount of product that can be obtained if all of the limiting reactant is completely consumed.
What is Limiting Reagent?
In a chemical reaction, the limiting reagent (also called limiting reactant) is the substance that is completely consumed when the reaction goes to completion. This means that the limiting reagent determines the amount of product that can be formed in the reaction. The other reactant(s) that are not completely consumed are said to be in excess.
To determine the limiting reactant, we need to compare the amount of product that each reactant can produce. The balanced equation tells us that 1 mole of Ca reacts with 2 moles of HCl to produce 1 mole of CaCl2 and 1 mole of H2. Using the molar masses of each substance, we can calculate the number of moles of each reactant:
1.00 g Ca x (1 mol Ca / 40.08 g Ca) = 0.0249 mol Ca
1.00 g HCl x (1 mol HCl / 36.46 g HCl) = 0.0275 mol HCl
Since the reaction requires 2 moles of HCl for every 1 mole of Ca, we can see that there is not enough HCl to completely react with all of the Ca. Therefore, HCl is the limiting reactant and Ca is in excess.
The theoretical yield is the amount of product that can be obtained if all of the limiting reactant is completely consumed. We can use the stoichiometry of the balanced equation to calculate the theoretical yield of CaCl2:
0.0275 mol HCl x (1 mol CaCl2 / 2 mol HCl) x (110.98 g CaCl2 / 1 mol CaCl2) = 1.52 g CaCl2
The actual yield is given as 1.21 g CaCl2. To calculate the percent yield, we use the formula:
percent yield = (1.21 g / 1.52 g) x 100% = 79.6%
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How many grams of NH3 must be dissolved in water to form a 5.0 L of 0.93 M solution.
Question 5 options:
4.65 g NH3
3.1 g NH3
17.0 g NH3
79 g NH3
Answer:b
Explanation:the answer is b
Describe clearly why a single indicator solution in only useful for measuring pH over a rather narrow range. Use a specific indicator of solution (ex. Crystal Violet, Thymol Blue, Methyl Orange, Methyl Red, Neutral Red...) to illustrate arguments.
Hence it will not be useful in determining the pH of the solution.
Because each indicator has a specified pH range over which it changes color, a single indicator solution is only appropriate for detecting pH over a relatively small range.
For instance, Methyl Orange changes hue from pH 3.1 to pH 4.4. The indicator won't change color and won't be useful for figuring out the pH of the solution if the pH is outside of this range. will not be useful in determining the pH of the solution.
An indication solution is what?A material that changes color when it comes into touch with an acid or a base is known as a "indicator solution". The conjugate base or acid versions of indicators, which are typically weak acids or bases, exhibit distinct hues because to variations in their absorption spectra1. We refer to these as acid-base indicators.
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What are foods that contain physical changes
A substance's form or appearance can be changed physically without affecting its chemical makeup.
Cutting fruits and vegetables, melting chocolate, and boiling eggs are examples of foods that go through physical changes.
For instance, slicing fruits and vegetables alter their size and shape, but not their chemical makeup.
Similar to melting chocolate, which transforms it from a solid to a liquid yet keeps its chemical makeup the same.
Physical changes Physical alterations are transformations that modify the physical appearance of matter without altering its chemical content. During the processing or cooking of food, numerous physical changes take place. As an example of a physical alteration, cutting fruits and vegetables modify their size and shape without changing their chemical makeup. Similar to melting, which transforms solid chocolate into liquid without altering its chemical composition. The solidification of melted cheese or the caramelization of sugar are two further instances of physical modifications in food. Food preparation and presentation are significantly influenced by physical changes in the meal.
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The gas pressure inside a scuba tank is 32 atm
at 301.15 °K. If it is cooled to 15 °C what is the
30.62 atm
(aqua green)
64.
pressure of the gas inside the tank?
The pressure of the gas inside the tank at 15°C is 30.62 atm.
Given data:
Initial pressure, P₁ = 32 atm
Temperature, T₁ = 301.15 K
Final temperature, T₂ = 15°C = 15 + 273.15 = 288.15 K
Let the final pressure be P₂. We need to calculate the value of P₂.Using Gay-Lussac's law of combining volumes, the pressure of a gas at a constant volume is directly proportional to its absolute temperature provided that the mass and the volume of the gas remain constant.
Let P₁/T₁ = P₂/T₂
Using this relation, we can write:
P₂ = P₁ x T₂/T₁
Substituting the given values in the above equation:
P₂ = 32 atm x 288.15 K/301.15 KP₂ = 30.62 atm.
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Answer: B
Explanation I did the test
if ph was to decrease, while pco2 remained the same, how would [hco3-] and [co32-] change in seawater? which one would show the greater change? (explain your reasoning.)
which of the following states of matter fills the volume of its container? a gas b solid c liquid d all of the above
The state of matter that fills the volume of its container is a gas. The correct option is a.
Gases have no definite shape or volume and will completely fill any container in which they are placed. This is because the particles that make up a gas are in constant motion and are not bound together in a fixed structure, allowing them to move freely and fill the available space.
Solids and liquids, on the other hand, have a definite shape and do not completely fill the volume of their container. Solids have a fixed shape and volume, while liquids have a fixed volume but take the shape of their container.
Therefore, the correct answer is (a) gas, which is the only state of matter that fills the volume of its container.
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