In the 100 ml volumetric flask, 17.3 mL of a 0.2514 M NaOH solution will be needed to fully neutralise the benzoic acid.
The first step in calculating the volume of NaOH required to neutralize the benzoic acid is to determine how many moles of benzoic acid are present in the 100 ml volumetric flask.
We can do this by dividing the mass of benzoic acid by its molar mass:
0.5312 g / 122.12 g/mol = 0.004346 mol benzoic acid
Since benzoic acid is a weak acid, we can use the Henderson-Hasselbalch equation to calculate the pH of its solution:
pH = pKa + log([A-⁻]/[HA])
The pKa of benzoic acid is 4.20. At the equivalence point of the titration, [A-] = [HA], so we can simplify the equation to:
pH = pKa + log(1) = pKa = 4.20
This means that the benzoic acid will be fully ionized at pH 4.20, and the volume of NaOH required to neutralize it can be calculated by using the balanced equation:
C₆H₅COOH + NaOH → NaC₆H₅COO + H₂O
The stoichiometric ratio of benzoic acid to NaOH is 1:1, so the moles of NaOH required to neutralize the benzoic acid is also 0.004346 mol.
To calculate the volume of 0.2514 M NaOH required to provide this number of moles, we can use the following equation:
moles = concentration x volume
0.004346 mol = 0.2514 mol/L x volume
volume = 0.0173 L = 17.3 mL
Therefore, 17.3 mL of 0.2514 M NaOH solution will be required to completely neutralize the benzoic acid in the 100 ml volumetric flask.
To learn more about benzoic acid refer to:
brainly.com/question/24052816
#SPJ4
which mechanism of heat transfer does not need any medium (molecules or atoms)? (1 point) group of answer choices conduction convection radiation
Radiation is the mechanism of heat transfer that does not need any medium. Hence, option C is correct.
Radiation is generally defined as the energy that comes from a source and travels through the space at the speed of light. This type of energy has an electric field and a magnetic field which is associated with it, and has wave-like properties. We can also call radiation as “electromagnetic waves”.
Generally, radiation is defined as the transfer of heat through electromagnetic waves through space. Unlike convection or conduction, in which energy produced from gases, liquids, and solids is transferred by the molecules with or without their physical movement, radiation does not need any medium (molecules or atoms). Hence, option C is correct.
Learn more about radiation from the link given below.
https://brainly.com/question/13934832
#SPJ4
Where does primary succession take place?
Answer:
Primary succession happens when a new patch of land is created or exposed for the first time.
Explanation:
Which action would increase the reaction rate of a chemical reaction in aqueous solution?
O adding excess cold water
O cooling the reaction mixture
O increasing the surface area of reactants
O removing a catalyst
which two subunits of na -nqr can be separated by gel filtration but not by ion exchange chromatography?
NqrB and NqrC are the two subunits of Na-NQR which can be separated by gel filtration but not by ion exchange chromatography.
The sodium-dependent NADH-quinone oxidoreductase (Na-NQR) is a membrane-bound enzyme complex found in bacteria that participates in the electron transport chain. It consists of six subunits: NqrA, NqrB, NqrC, NqrD, NqrE, and NqrF.
we need to consider the properties of the subunits and the mechanisms of the separation techniques. Gel filtration separates molecules based on their size, while ion exchange chromatography separates molecules based on their charge.
Based on this information, we can infer that the two subunits that can be separated by gel filtration but not by ion exchange chromatography are those that have similar sizes but different charges. Among the six subunits of Na-NQR, NqrB and NqrC are the two subunits that have similar molecular weights (~45 kDa) but different charges.
To know more about gel filtration here
https://brainly.com/question/21892130
#SPJ4
How many grams are there in 8.25 L of oxygen gas (O2)
hey guys show work I don't know what's going on... also does the number 22.4 have to be in there somehow???? send help
There are approximately 11.78 grams of oxygen gas (O2) in 8.25 L at STP.
What is the mass of 8.25L of oxygen at STP?
To calculate the number of grams of oxygen gas (O2) in 8.25 L, we need to use the ideal gas law which states:
PV = nRT
Where;
P is the pressure of the gas, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.Assuming standard temperature and pressure (STP) conditions (0°C and 1 atm), we can use the molar volume of a gas at STP, which is 22.4 L/mol, to calculate the number of moles of oxygen gas in 8.25 L:
n = (V / V_m) = (8.25 L) / (22.4 L/mol) = 0.3683 mol
The molar mass of O2 is approximately 32 g/mol, so we can calculate the number of grams of oxygen gas in 0.3683 mol:
mass = n x molar mass = 0.3683 mol x 32 g/mol = 11.78 g
Learn more about mass of oxygen here: https://brainly.com/question/12902286
#SPJ1
a reactant decomposes with a half-life of 103 103 s when its initial concentration is 0.154 0.154 m. when the initial concentration is 0.664 0.664 m, this same reactant decomposes with the same half-life of 103 103 s. what is the order of the reaction? 2 0 1 what is the value and unit of the rate constant for this reaction?
The order of reaction is 1 and the value of the rate constant is 6.74*10^-5s^-1.What is the order of the reaction? To solve this question we have to check the half-life of a chemical reaction at different concentrations.
It is given in the question that when the initial concentration of reactant is 0.154m, it has half-life of 103s. Similarly, when initial concentration is 0.664m, it has half-life of 103s. To find the order of reaction, we have to use the equation for half-life of reaction. The equation for half-life of reaction is given as:\[\frac{t_{1/2} }{2}=\frac{1}{k}\frac{1}{[A]_{0}}\]Where, t1/2 is half-life of the reaction,[A]0 is the initial concentration of the reactant and k is the rate constant.
Putting the values in equation: When [A]0 = 0.154m and t1/2 = 103s, we get:\[\frac{103}{2}= \frac{1}{k} \frac{1}{0.154}\] Multiplying both sides with 0.154k:\[k*\frac{103}{2}*0.154 = 1\]When [A]0 = 0.664m and t1/2 = 103s, we get:\[\frac{103}{2}= \frac{1}{k} \frac{1}{0.664}\]Multiplying both sides with 0.664k:\[k*\frac{103}{2}*0.664 = 1\]Dividing second equation by first equation:\[\frac{k*\frac{103}{2}*0.664}{k*\frac{103}{2}*0.154}= \frac{0.664}{0.154}\] Simplifying the above equation, we get:\[k=6.74*10^{-5}s^{-1}\]Therefore, the order of reaction is 1 and the value of the rate constant is 6.74*10^-5s^-1.
Learn more about order of the reaction at: brainly.com/question/14957291
#SPJ11
which element requires the most energy to lose one electron?A) LiB) Ca2+ the electron is removed from an inner shell requiring the most energyC) Si2+D) PE) Na
Among the given options, the element that requires the most energy to lose one electron is option B) Ca2+.
This is because, in Ca2+, the electron is removed from an inner shell, which requires more energy than removing an electron from the outer shell. The outermost electron shell of Ca2+ is already filled with electrons, so the next electron is in an inner shell, which is tightly bound to the nucleus. Therefore, it requires more energy to remove this electron than it does to remove an electron from an outer shell.
The other options listed are:
A) Li: Lithium has a single electron in its outer shell, so it is relatively easy to remove an electron from it.
C) Si2+: Silicon has four electrons in its outer shell, so it requires less energy than Ca2+ to remove one electron.
D) P: Phosphorus has five electrons in its outer shell, so it requires less energy than Ca2+ to remove one electron.
E) Na: Sodium has a single electron in its outer shell, so it requires less energy than Ca2+ to remove one electron.
To learn more about electron visit;
https://brainly.com/question/12001116
#SPJ4
How many grams of lithium hypochlorite (LiClO) are there in 0.704 mol ?
Answer:
The mass of lithium hypochlorite are 34.7 grams.
Explanation:
Moles of = 0.594 g. Molar mass of = 58.4 g/mol.
Draw the repeat unit of the addition polymer that can be formed from Pent-4-enoic acid.
The repeat unit of the addition polymer that can be formed from Pent-4-enoic acid is shown below:
H H
| |
H₂- C = C-C(CH₂)₂COOH
| |
H H
How to draw a repeat unit?Since polymer molecules are much larger than most other molecules, the concept of a repeat unit is used when drawing a displayed formula.
When creating one, change the monomer's double bond to a single bond in the repeat unit, and add a bond to each end of the repeat unit. At the end, put the letter n in subscript after the brackets (n represents a very large number of the repeating unit)
Learn more on repeat units here: https://brainly.com/question/27677202
#SPJ1
If 10.0 grams of HCl reacts with excess magnesium, calculate the mass of magnesium chloride that will be made in the following equation:
Mg + 2HCl ---> MgCl2 + H2
3.33 grams of magnesium were utilized, and the same amount of magnesium chloride was generated.
How can you figure out how much magnesium chloride was produced in the reaction given?One mole of magnesium interacts with two moles of hydrochloric acid to form one mole of magnesium chloride and one mole of hydrogen gas, as shown by the equation.
mass / molar mass equals moles of HCl.
The formula for HCl is 10.0 g/36.46 g/mol (molar mass of HCl)
HCl equals 0.274 moles per unit.
Mg = 0.274 moles and 2 moles of Mg are equal to 0.137 moles.
When 0.137 moles of HCl are added, the mass of magnesium needed is:
Mg mass is calculated as Mg moles times Mg molar mass.
Mg's mass is 3.33 g.
To learn more about mass of product visit:
brainly.com/question/19694949
#SPJ1
how many molecules are in 48.0 grams of oxygen, o2?
Draw Lewis structures for the fulminate ion including possible resonance forms.
Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all hydrogen atoms and nonbonding electrons. Show the formal charges of all atoms in the correct structure.
The fulminate ion has the chemical formula CNO-, and its Lewis structure can be drawn as follows:
Place the carbon atom in the center since it is the least electronegative atom among C, N, and O.
Connect the carbon atom to the nitrogen atom with a triple bond, as nitrogen is more electronegative than carbon.
Connect the nitrogen atom to the oxygen atom with a single bond since oxygen is more electronegative than nitrogen.
Add a lone pair of electrons to the oxygen atom to satisfy its octet.
Place a negative charge on the oxygen atom since it has gained an extra electron.
The Lewis structure with all atoms and bonds is as follows:
markdown
O
||
C ≡ N -
||
H
All atoms except for the nitrogen atom have a formal charge of 0. The nitrogen atom has a formal charge of +1 because it has four valence electrons but only three bonding electrons. The oxygen atom has a formal charge of -1 because it has six valence electrons but seven electrons around it.
The Lewis structure can also be represented by showing the possible resonance forms:
makefile
O O
|| ||
C = N ↔ C ≡ N
|| ||
H H
In this case, the double bond is delocalized between the carbon and nitrogen atoms, and both resonance structures contribute to the overall electronic structure of the fulminate ion.
brainly.com/question/31184756
SPJ11
this is a reddish-brown irritating gas that gives photochemical smog its brownish color; in the atmosphere it can also be converted in the atmosphere into an acid that is one of the major component of acid deposition, what is this substance? (if you use the chemical formula don't use subscripts instead just use numbers example c6h12o6)
The substance that gives photochemical smog its brownish color is Nitrogen dioxide.
Nitrogen dioxide (NO2) is a reddish-brown irritating gas that is a prominent air pollutant. In the atmosphere, NO2 can be converted into an acid, which is one of the main components of acid deposition, when it combines with water, oxygen, and other chemicals. Nitrogen dioxide is one of the primary pollutants in urban areas.
When NO2 and other chemicals in the atmosphere come into contact with sunlight, they produce photochemical smog, which is a type of air pollution that appears as a brownish haze.
Nitrogen dioxide is formed when nitrogen oxides (NOx) react with sunlight and other atmospheric compounds. Nitrogen oxides are produced by a variety of natural and human activities. For example, NOx can be produced by vehicle exhaust, power plants, and other industrial sources.
Nitrogen dioxide has a wide range of negative health and environmental consequences. NO2 is also one of the primary constituents of acid rain, which is a type of precipitation that is acidic.
Acid rain has a significant impact on the environment and human health. When it falls to the ground, it can cause damage to plants, animals, and ecosystems. Acid rain can also cause respiratory problems in humans and other animals.
In conclusion, nitrogen dioxide is a reddish-brown irritating gas that is a significant air pollutant. Nitrogen dioxide, along with other pollutants, contributes to the formation of photochemical smog and acid rain, both of which have significant health and environmental consequences.
To know more about Nitrogen dioxide, refer here:
https://brainly.com/question/3871880#
#SPJ11
why is the condensation (dehydrated) product rather than the aldol addition (hydrated) product obtained in this experiment? (what makes the condensation product exceptionally stable?
The condensation (dehydrated) product rather than the aldol addition (hydrated) product obtained in this experiment is due to the greater stability of the condensation product.
The aldehyde is dehydrated in the aldol condensation process to produce the β-hydroxyaldehyde which then eliminates a water molecule to form an α,β-unsaturated aldehyde or ketone. The condensation product is obtained rather than the aldol addition product in this experiment due to the greater stability of the condensation product. The condensation product is exceptionally stable due because the resonance stabilization. In the condensation product, the carbonyl group in the β position is connected to the α-carbon through a double bond. The carbon-carbon double bond is delocalized over the two carbon atoms in the compound, and this contributes to the overall stability of the compound.
Chelation effect, the carbonyl group in the β position is also involved in chelation with the metal ion. As a result, the overall stability of the compound is increased. Elimination of the water molecule: In the aldol reaction, the product of the reaction has a water molecule in it. This water molecule is eliminated during the condensation reaction, which leads to an increase in the stability of the compound.
Learn more about aldehyde at:
https://brainly.com/question/30459994
#SPJ11
A small fish eats part of a plate and then is eaten by a larger fish. The large fish is then eaten by a shark. What situation has occurred
A small fish eats part of a plate and then is eaten by a larger fish. The large fish is eaten by a shark. The situation described is an example of a food chain in an ecosystem.
The small fish is a primary consumer, which eats part of a plate. The larger fish is a secondary consumer, which eats the small fish. The shark is a tertiary consumer, which eats the larger fish.
This sequence of events is an example of how energy and matter flow through an ecosystem. The energy from the sun is captured by producers, such as plants, and then passed on to primary consumers, which are eaten by secondary consumers, and so on.
This transfer of energy and matter is known as a food chain or a food web, and it is an important concept in ecology.
To know more about food chain here
https://brainly.com/question/7564953
#SPJ4
How many molecules are in 0. 500 mole of N2O5
0.500 moles of N₂O₅ contain roughly 3.011 x 10²³ molecules.
To determine the number of molecules in 0.500 moles of N₂O₅, we first need to know the Avogadro's number, which is 6.022 x 10²³ molecules per mole.
We can use this conversion factor to calculate the number of molecules as follows:
Number of molecules = (0.500 moles N₂O₅) x (6.022 x 10²³ molecules per mole)
Number of molecules = 3.011 x 10²³ molecules
Therefore, there are approximately 3.011 x 10²³ molecules in 0.500 moles of N₂O₅.
This calculation is useful in various applications, such as in chemical reactions, where it is important to know the number of reactant molecules present in a given amount of substance.
To learn more about molecules refer to:
brainly.com/question/8262214
#SPJ4
We must utilize Avogadro's constant to compute the number of molecules in 0.500 mole of N2O5. The number of particles in a material and its mass are related by the proportionality constant known as Avogadro's constant.
The number of particles per mole that make up Avogadro's constant is 6.022 x 1023. We must multiply the number of moles by Avogadro's constant to determine the number of molecules in 0.500 moles of N2O5: = 0.500 mole x 6.022 x 1023 molecules/mole = number of molecules 3.011 x 1023 molecules are the total number. As a result, one mole of N2O5 contains around 3.011 x 1023 molecules. It is crucial to remember that the quantity of a material, measured in moles, is proportional to the number of molecules in a sample. constant allows us to convert between the number of molecules and the amount of substance in a sample.
learn more about N2O5 here:
https://brainly.com/question/19100869
#SPJ4
it takes 30.50 min for co to effuse through a pinhole. under identical experimental conditions, the time taken for an unknown gas was 32.60 min. what is the unknown gas?
Since the molar mass of the unknown gas is less than that of nitrogen or carbon dioxide, it is likely a lighter gas such as helium (He) or hydrogen (H₂).
What is effusion rate?Effusion rate of a gas is inversely proportional to the square root of its molar mass and therefore, we use Graham's law of effusion to determine the molar mass of unknown gas.
Let molar mass of CO be M₁ and molar mass of the unknown gas be M₂.
According to Graham's law of effusion: (rate of CO) / (rate of unknown gas) = √(M₂ / M₁)
So, (30.50 / 32.60) = √(M₂ / M₁)
(30.50 / 32.60)² = M₂ / M₁
M₂ = M₁ * (30.50 / 32.60)²
= 28 * (30.50 / 32.60)²
M2 = 25.4 g/mol
Therefore, molar mass of the unknown gas is approximately 25.4 g/mol. Molar mass of nitrogen (N₂) is approximately 28 g/mol, and molar mass of carbon dioxide (CO₂) is approximately 44 g/mol. Since the molar mass of the unknown gas is less than that of nitrogen or carbon dioxide, it is likely a lighter gas such as helium (He) or hydrogen (H₂).
To know more about effusion rate, refer
https://brainly.com/question/15577129
#SPJ1
A ball is rolling 0. 25 meters per second. How fast is it moving in units of miles per hour?
Answer:
0.56 mi/hr
Explanation:
hope this helps
Another explosive, gas producing reaction: TNT 2 C 7
H 5 N 3 O 6 —> 3 N 2 + 5 H 2 O + 7
a. Calculate the number of moles of carbon monoxide produced if 2550 grams TNT decomposes according to the equation above.
b. In a 1.00 L container, what would be the pressure of this many moles of CO at 5000 °c?
c. What volume would be occupied by this number of miles at standard pressure (101.3 kPa) and 5000 °c?
a. the number of moles of carbon monoxide is 39.21875 mol CO
b. the pressure of CO in a 1.00 L container at 5000°C is 178,426 atm.
c. the volume occupied by 39.21875 moles of CO at standard pressure (101.3 kPa) and 5000°C is 17,706 L.
The given chemical equation is incorrect as it shows the production of carbon monoxide (CO) which is not produced in the reaction of TNT. The correct equation for the decomposition of TNT is:
2 C7H5N3O6 -> 3 N2 + 5 H2O + 7 CO
a. Calculate the number of moles of carbon monoxide produced if 2550 grams of TNT decomposes according to the equation above.
Molar mass of TNT = (2 x 12.01) + (7 x 1.01) + (3 x 14.01) + (6 x 16.00) = 227.13 g/mol
Number of moles of TNT = 2550 g / 227.13 g/mol = 11.225 mol
From the balanced equation, 7 moles of CO are produced for every 2 moles of TNT. Therefore, the number of moles of CO produced will be:
11.225 mol TNT x (7 mol CO / 2 mol TNT) = 39.21875 mol CO
b. In a 1.00 L container, what would be the pressure of this many moles of CO at 5000°C?
We can use the Ideal Gas Law to determine the pressure of CO at 5000°C:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
Since the volume is given as 1.00 L, we can convert the temperature to Kelvin:
5000°C + 273.15 = 5273.15 K
The gas constant is R = 0.08206 L•atm/(mol•K).
Substituting the values into the Ideal Gas Law and solving for P:
P = nRT/V = (39.21875 mol)(0.08206 L•atm/(mol•K))(5273.15 K)/1.00 L = 178,426 atm
Therefore, the pressure of CO in a 1.00 L container at 5000°C is 178,426 atm.
c. What volume would be occupied by this number of moles at standard pressure (101.3 kPa) and 5000°C?
To determine the volume occupied by 39.21875 moles of CO at standard pressure and 5000°C, we can use the Ideal Gas Law again, but this time with the pressure and temperature given in standard units:
P = 101.3 kPa = 1.00 atm
T = 5000°C + 273.15 = 5273.15 K
Substituting these values and solving for V:
V = nRT/P = (39.21875 mol)(0.08206 L•atm/(mol•K))(5273.15 K)/(1.00 atm) = 17,706 L
Therefore, the volume occupied by 39.21875 moles of CO at standard pressure (101.3 kPa) and 5000°C is 17,706 L.
learn more about moles here
https://brainly.com/question/14357742
#SPJ1
The molar heat of fusion for Gold is 12.5 kJ/mol. The specific heat capacity of gold is 0.129 J/g oC.
Calculate the amount of energy required to melt 70.0 g of solid Gold and then heat the liquid to 1213 oC? The melting point of gold is 1063 oC.
Explanation:
The heat of fusion given has units of kJ / MOL
so we need to find the number of moles in 70 . 0 g
using periodic table, mole wt for AU =196.97 g/mol
then 70 g is 70 g / 196.97 g/mol = .355 mole
Now to MELT the gold .355 mole * 12.5 kJ/mol = 4.44 kJ ( = 4440 J)
Then to HEAT the liquid to 1213 degrees C from the melting point :
70 g * (1213 - 1063) C * .129 J / (g C) = 1355 J
Then add together 4.44kJ + 1355 J = 4440 J + 1355 J = 5795 J
when filling a burette for a titration, adjust the burette so that choose... , preferably over a sink. then, choose... to add the titrant into the burette. the titrant should be filled choose... .
When filling a burette for a titration, adjust the burette so that the tip is located slightly below the level of the meniscus, preferably over a sink. Then, use a funnel to add the titrant into the burette. The titrant should be filled above the 0.00 mL line.
A burette is a laboratory equipment that is used to dispense known volumes of liquid in experimental procedures. It is usually made of glass and has a long, cylindrical shape with a stopcock at the bottom to control the flow of liquid.
Burettes are commonly used in titration experiments to accurately measure the volume of the titrant added to the sample. Adjust the burette so that the tip is located slightly below the level of the meniscus, preferably over a sink. This is to prevent the loss of any of the titrant that may overflow. Using a funnel, carefully add the titrant into the burette. Make sure to pour the titrant slowly to avoid splashing or spilling any of it. The titrant should be filled above the 0.00 mL line.
This allows the initial volume of the titrant to be measured accurately before titration commences. If there are air bubbles present, they should be removed by gently tapping the burette.
Know more about titrant
https://brainly.com/question/186765
#SPJ11
In glycolysis, ATP is consumed in the reaction producing which compound?A) fructose-6-phosphateB) fructose-1,6-bisphosphateC) 3-phosphoglycerateD) 1,3-bisphosphoglycerateE) phosphoenolpyruvate
In glycolysis, ATP is consumed in the reaction producing fructose-1,6-bisphosphate, which is a crucial intermediate in the pathway and is required for the further breakdown of glucose to pyruvate. The correct answer is option: B.
Glycolysis is the process by which glucose is broken down into two molecules of pyruvate, which is a key step in cellular respiration. The process occurs in ten steps and involves the conversion of glucose to two molecules of pyruvate, with the concomitant production of ATP and NADH . During the third step of glycolysis, the enzyme phosphofructokinase catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, consuming one molecule of ATP in the process. Option: B is correct.
To know more about fructose-1,6-bisphosphate, here
brainly.com/question/16860469
#SPJ4
a certain solution of salt water has a molality of 3.24 m what is the mole fraction of salt in the solution
The mole fraction of salt in a solution of saltwater with a molality of 3.24 m is 0.764.
Molality is a measure of concentration used in chemistry. Molality is a measure of the amount of solute dissolved in a certain quantity of solvent, usually measured in moles per kilogram. Mole fraction is a measure of the amount of solute present in a solution. The mole fraction of a component in a solution is given by the number of moles of that component divided by the total number of moles of all the components present in the solution.
Mole fraction can be calculated using the following formula:
Xsolute = nsolute / ntotal
where, Xsolute = mole fraction of the solute, n solute = number of moles of the solute, n total = total number of moles of all the components in the solution
Given that the molality of saltwater is 3.24 m. This means that 3.24 moles of salt are present in 1 kg of water. Therefore, the total number of moles of all the components present in the solution is:
n total = 3.24 + 1.00 = 4.24 moles. The mole fraction of salt in the solution is given by:
nsolute / ntotal = 3.24 / 4.24 = 0.764
To know about molality, refer here:
https://brainly.com/question/26921570#
#SPJ11
a certain compound is 76.0% nitrogen by mass. how many moles of nitrogen are contained in 2.50 g of this compound?
2.50 g of the molecule has 0.135 moles of nitrogen. Atomic number 7 and the letter N both identify nitrogen as a chemical element.
A compound must have another element or components to make up the remaining 24.0% of its mass if it contains 76.0% nitrogen by mass.
Calculating the mass of nitrogen in 2.50 g of the molecule is necessary before determining how many moles of nitrogen are present there:
Nitrogen mass is equal to 76.0% x 2.50 g, or 1.90 g.
Then, we can translate the mass of nitrogen into moles using its molar mass:
1 mol N equals 14.01 g N.
N in moles per 2.50 g is calculated as 1.90 g / 14.01 g/mol = 0.135 mol.
Consequently, 2.50 g of the molecule has 0.135 moles of nitrogen.
Learn more about nitrogen here:
https://brainly.com/question/11987620
#SPJ4
A buffer solution is prepared by adding NaH2PO4 to a solution of H3PO4. What happens if KOH is added?
which of the following would be the most soluble in water? question 4 options: a) cacl2 b) c6h6 c) ch3ch2ch3 d) c2h2 e) ch4
The most water-soluble of the aforementioned chemicals is ethylene glycol (HOCH2 CH2 OH). Two of the hydroxy groups in ethylene glycol create hydrogen bonds with one another.
What makes water so soluble?Water is a great solvent that can dissolve a wide variety of compounds due to its polarity and capacity to create hydrogen bonds. Because it is more polar than methane, methanol dissolves better in water. Water is polar, whereas methane is non-polar.
What substances dissolve best in water?All salts of sodium, potassium, and ammonium are water soluble. 3. All metals, with the exception of lead, silver, and mercury(I), have chlorides, bromides, and iodides that are soluble in water. In water, HgI2 is insoluble.
To know more about hydroxy groups visit:-
brainly.com/question/30693935
#SPJ1
2Al(s) + 3Cu(NO3)2(aq) → 3Cu(s) + 2Al(NO3)3(aq)
Aluminum, a silver colored metal, is placed in a solution of copper(II) nitrate, which is blue. The reaction produces a reddish brown solid, copper metal, and colorless aluminum nitrate solution.
According to the data in the table, what is the limiting reactant? answer choices
Copper(II) nitrate solution, because the solution was colorless at the end showing it was completely consumed in the reaction.
Copper(II) nitrate solution, because the solution was blue at the end of the reaction showing some copper(II) nitrate remained at the end of the reaction.
Aluminum, because some aluminum remained at the end of the reaction.
Aluminum, because it was completely consumed in the reaction.
The restricting reactant is the reactant that is totally consumed in the reaction, thereby restricting how much item that can be shaped. To decide the restricting reactant, we want to look at how much every reactant present to the stoichiometric ratio of the reasonable chemical equation.
In this case, the decent chemical equation is:
2Al(s) + 3Cu(NO3)2(aq) → 3Cu(s) + 2Al(NO3)3(aq)
From the equation, we can see that the stoichiometric ratio of aluminum to copper(II) nitrate is 2:3. This means that for each 2 moles of aluminum, we want 3 moles of copper(II) nitrate to totally respond.
Based on the given information, aluminum is the restricting reactant because it is totally consumed in the reaction, while copper(II) nitrate remains in the solution. This is indicated by the colorless solution of aluminum nitrate shaped, which indicates that all of the copper(II) nitrate has responded with aluminum to frame copper metal and aluminum nitrate.
Therefore, the right answer is Aluminum, because it was totally consumed in the reaction.
to know more about reactant click here:
https://brainly.com/question/17096236#
#SPJ4
What are foods that contain chemical changes
meat cooking is a chemical change
Heating a meat changes its colour to brownish due to Maillard reaction
at which point in a titration are the concentrations of the weak acid and its conjugate base approximately equal?
In a titration of a weak acid with a strong base, the concentration of the weak acid and its conjugate base are approximately equal at the halfway point of the titration, also known as the half-equivalence point.
At the beginning of the titration, the solution contains only the weak acid and its concentration is high. As the strong base is added, it reacts with the weak acid to form its conjugate base and water. The concentration of the weak acid gradually decreases while the concentration of the conjugate base increases until it reaches the halfway point.
At the halfway point, half of the weak acid has been neutralized by the strong base, and half remains in the solution. At this point, the concentrations of the weak acid and its conjugate base are approximately equal, and the pH of the solution is equal to the pKa of the weak acid. After the half-equivalence point, the concentration of the conjugate base becomes higher than the concentration of the weak acid, and the pH of the solution starts to rise more rapidly.
To learn more about weak acid refer to:
brainly.com/question/22104949
#SPJ4
The balanced equation below represents the reaction that occurs inside the airbag:
2NaN 3 (s) à 2Na(s) + 3N 2 (g)
How many grams of NaN 3 are needed to produce the number of moles you calculated in problem 1 above?
Approximately 402.27 grams of sodium azide (NaN₃) must decompose to fill a 55.0-gallon airbag.
What is ideal gas law?The ideal gas law is a fundamental equation that describes the behavior of ideal gases under a wide range of conditions. It relates the pressure (P), volume (V), temperature (T), and number of moles of gas (n) of an ideal gas through the equation:
PV = nRT
where R is the gas constant, which has a value of 8.314 J/(mol·K) or 0.0821 L·atm/(mol·K) in SI units.
We know that the volume of the airbag is 55.0 gallons, so we need to convert this to liters using a conversion factor.
1 gallon = 3.78541 liters
Therefore, the volume of the airbag in liters is:
55.0 gallons x 3.78541 liters/gallon = 208.20 liters
Next, we need to calculate the number of moles of N₂ gas that would be produced from the decomposition of NaN₃ required to fill the airbag.
From the balanced equation:
2 NaN₃ (s) -> 2 Na (s) + 3 N₂ (g)
We can observe that two moles of NaN₃ result in three moles of N₂. Therefore, the number of moles of N2 produced is:
moles of N2 = (2/3) x moles of NaN₃
To fill the airbag, we need enough N₂ gas to occupy a volume of 208.20 liters. One mole of any gas has a volume of 22.4 litres at standard temperature and pressure (STP).
Therefore, the number of moles of N₂ required is:
moles of N₂ = (208.20/22.4) = 9.29 moles
Now we can use the balanced equation to calculate the number of moles of NaN₃ required:
2 NaN₃ (s) -> 2 Na (s) + 3 N2 (g)
For every 3 moles of N₂ produced, we need 2 moles of NaN3. Therefore, the number of moles of NaN₃ required is:
moles of NaN₃ = (2/3) x moles of N₂ = (2/3) x 9.29 = 6.19 moles
Finally, we can use the molar mass of NaN₃ to calculate the mass required:
mass of NaN₃ = moles of NaN₃ x molar mass of NaN₃
The molar mass of NaN₃ is:
Molar mass of NaN₃ = (1 x 22.99) + (3 x 14.01) = 65.01 g/mol
Therefore, the mass of NaN₃ required to fill the airbag is:
mass of NaN₃ = 6.19 moles x 65.01 g/mol = 402.27 grams
To know more about Ideal gas law, visit:
https://brainly.com/question/28206895
#SPJ1