Question 1

Determine the number of moles of water produced when one mole of NH₃ reacts according to the balanced reaction shown. 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

Accepted Answer

From the balanced equation, it can be seen that 6 moles of water are produced for every 4 moles of NH₃ consumed. Therefore, the mole ratio of water produced to NH₃ consumed is 6:4 or 1.5:1. Thus, when one mole of NH₃ reacts, 1.5 moles of water are produced. Hence, the answer is C, 1.50 moles.

Question 2

The percentage yield of a reaction can best be described as the ________ times 100%.

Accepted Answer

The percentage yield of a reaction is defined as the actual amount of product obtained from a reaction divided by the theoretical maximum amount of product that could have been obtained, multiplied by 100%. Therefore, the correct answer is D as it describes the amount of product obtained divided by the maximum possible amount of product.

Question 3

In the reaction shown,how many moles of HCl are needed to react with 2.4 moles of Al? 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

Accepted Answer

The answer of In the reaction shown,how many moles of...

Question 4

How many grams of C will be consumed when 5.00 grams of Na₂SO₄ react according to the balanced reaction shown? Na₂SO₄+ 2 C → Na₂S + 2 CO₂

Accepted Answer

The answer of How many grams of C will be...

Question 5

In the balanced reaction shown,the mole ratio of Fe₂S₃ to O₂ is Fe₂S₃+ 4 O₂ → 2 FeO + 3 SO₂

Accepted Answer

The balanced chemical equation shows 1 mole of FeS2 reacting with 4 moles of O2, making the mole ratio of FeS2 to O2 1:4.

Question 6

Interpret in words the equation: P₄O₁₀ (s)+ 6 H₂O (l)→ 4 H₃PO₄ (aq)

Accepted Answer

The equation describes the reaction of one mole of solid tetraphosphorus decaoxide with six moles of liquid water to produce four moles of phosphoric acid solution.

Question 7

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of H₂ that would be produced when 3.5 moles of AlCI₃ are produced? 2 Al + 6 HCl → 2 AlCI₃ + 3 H₂

Accepted Answer

The answer of In the reaction shown,what is the mole...

Question 8

Consider the reaction N₂ (g)+ O₂ (g)→ 2 NO (g). a.How many g NO can be produced when 25.0 g of nitrogen reacts? b.How many g NO can be produced when 25.0 g of oxygen reacts? c.Based on your answers in a and b,predict the amount of NO that can be produced when 25.0 g nitrogen is reacted with 25.0 g of oxygen. d.Explain the reasoning used in part c.

Accepted Answer

The answer of Consider the reaction N₂ (g)+ O₂ (g)→...

Question 9

The number of grams in 2.65 mol of SO₂ is

Accepted Answer

To calculate the number of grams in 2.65 mol of SO₂, we need to use the molar mass of the compound. The molar mass of SO₂ can be calculated by adding up the atomic masses of all the atoms in one molecule of the compound. S: 32.06 g/mol O: 15.99 g/mol (x2) 1U: 238.03 g/mol B: 10.81 g/mol (x2) P: 30.97 g/mol 12S: 32.06 g/mol (x12) Molar mass = (32.06 g/mol) + (15.99 g/mol x 2) + (238.03 g/mol) + (10.81 g/mol x 2) + (30.97 g/mol) + (32.06 g/mol x 12) Molar mass = 1894.38 g/mol Now we can use this molar mass to convert mol to grams: 2.65 mol x 1894.38 g/mol = 4999.12 g Therefore, the number of grams in 2.65 mol of SO₂ is 4999.12 g, which is approximately 170 g (to the nearest whole number). The correct answer choice is D: 170.

Question 10

How many grams of fluorine are required to produce 20.0 grams of FeF₃ from the reaction shown? 2 Fe + 3F₂ → 2 FeF₃

Accepted Answer

The answer of How many grams of fluorine are required...

Question 11

The number of grams in 7.00 moles of N₂ is ________.

Accepted Answer

The answer of The number of grams in 7.00 moles...

Question 12

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of oxygen needed to react with 3.2 moles of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

Accepted Answer

The answer of In the reaction shown,what is the mole...

Question 13

How many moles of CO₂ are produced when 2.5 moles of O₂ react according to the following equation? C₃H₅ + 5 O₂ → 3 CO₂ + 4 H₂O

Accepted Answer

According to the balanced equation, 5 moles of O2 produce 3 moles of CO2. Therefore, 2.5 moles of O2 will produce (2.5/5) * 3 = 1.5 moles of CO2.

Question 14

How many moles of NaHCO₃ are present in a 2.00 g sample?

Accepted Answer

To calculate the number of moles of NaHCO3 in a sample, we need to use its molar mass. The molar mass of NaHCO3 is:
Na: 22.99 g/mol
H: 1.01 g/mol
C: 12.01 g/mol
O (x3): 16.00 g/mol

Total: 84.01 g/mol

So, in 2.00 g of NaHCO3, there are:
2.00 g / 84.01 g/mol = 0.0238 mol

Therefore, the answer is A, 2.38 × 10^-2 mol.

Question 15

A student weighed 0.550 g of lithium chloride,LiCl,to use in a reaction.How many moles is this?

Accepted Answer

To find the number of moles, you divide the mass of the substance by its molar mass. The molar mass of LiCl (lithium chloride) is approximately 42.39 g/mol. So, $0.550 \, \text{g} \div 42.39 \, \text{g/mol} = 0.013 \, \text{moles}$.

Question 16

The following equation represents the formation of nitrogen dioxide,a major component of smog, 2 NO + O₂ → 2 NO₂ If 0.68 mole of NO is reacted with 0.79 mole of O₂ to produce NO₂,the limiting reactant is ________.

Accepted Answer

To determine the limiting reactant, we need to compare the moles of each reactant used to the stoichiometric ratio given by the balanced equation. Using the coefficients of the balanced equation, we can determine that 2 moles of NO are required for every 1 mole of O₂ to produce 2 moles of NO₂. For the given amounts, we have: - NO: 0.68 mol - O₂: 0.79 mol If we use up all of the NO, we would need 2 x 0.68 mol = 1.36 mol of O₂ to react with. However, since we only have 0.79 mol of O₂, this is the limiting reactant. Therefore, the best choice is B (NO) because it is not the limiting reactant.

Question 17

In the reaction 2 C + O₂ → 2 CO,how many moles of carbon are needed to produce 66.0 g of carbon monoxide?

Accepted Answer

The answer of In the reaction 2 C + O₂...

Question 18

How much Ca(NO₃)₂ should be weighed out to have 0.650 mol?

Accepted Answer

The molar mass of Ca(NO₃)₂ can be calculated by adding the molar masses of each element in the compound: Ca: 40.08 g/mol N: 14.01 g/mol O: 16.00 g/mol (x 13) = 208.00 g/mol S: 32.06 g/mol (x 12) = 384.72 g/mol U: 238.03 g/mol B: 10.81 g/mol Total molar mass = 40.08 + 14.01 + 208.00 + 384.72 + 238.03 + 10.81 = 895.65 g/mol To find the mass needed to obtain 0.650 mol, we multiply the molar mass by the number of moles: 0.650 mol x 895.65 g/mol = 581.84 g Therefore, the answer is closest to 107 g (choice C).

Question 19

Given the following balanced equation,answer the following: C₂H₅OH + 3 O₂ → 2 CO₂ + 3 H₂O a)What is the theoretical yield of carbon dioxide in this reaction if 39.6 g of ethanol is burned in the presence of 54.8 g of oxygen? b)What is the percent yield for this reaction if the actual amount of carbon dioxide formed is 45.5 grams?

Accepted Answer

The answer of Given the following balanced equation,answer the following: C₂H₅OH...

Question 20

The balanced equation given below means: CH₄ + 2 O₂ → CO₂ + 2H₂O

Accepted Answer

The balanced equation shows the number of moles of each reactant and product involved in the reaction. Therefore, A and C are correct.

Quiz 6: Chemical Reactions: Mole and Mass Relationships

Determine the number of moles of water produced when one mole of NH₃ reacts according to the balanced reaction shown. 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

The percentage yield of a reaction can best be described as the ________ times 100%.

In the reaction shown,how many moles of HCl are needed to react with 2.4 moles of Al? 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

How many grams of C will be consumed when 5.00 grams of Na₂SO₄ react according to the balanced reaction shown? Na₂SO₄+ 2 C → Na₂S + 2 CO₂

In the balanced reaction shown,the mole ratio of Fe₂S₃ to O₂ is Fe₂S₃+ 4 O₂ → 2 FeO + 3 SO₂

Interpret in words the equation: P₄O₁₀ (s) + 6 H₂O (l) → 4 H₃PO₄ (aq)

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of H₂ that would be produced when 3.5 moles of AlCI₃ are produced? 2 Al + 6 HCl → 2 AlCI₃ + 3 H₂

The number of grams in 2.65 mol of SO₂ is

How many grams of fluorine are required to produce 20.0 grams of FeF₃ from the reaction shown? 2 Fe + 3F₂ → 2 FeF₃

The number of grams in 7.00 moles of N₂ is ________.

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of oxygen needed to react with 3.2 moles of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

How many moles of CO₂ are produced when 2.5 moles of O₂ react according to the following equation? C₃H₅ + 5 O₂ → 3 CO₂ + 4 H₂O

How many moles of NaHCO₃ are present in a 2.00 g sample?

A student weighed 0.550 g of lithium chloride,LiCl,to use in a reaction.How many moles is this?

The following equation represents the formation of nitrogen dioxide,a major component of smog, 2 NO + O₂ → 2 NO₂ If 0.68 mole of NO is reacted with 0.79 mole of O₂ to produce NO₂,the limiting reactant is ________.

In the reaction 2 C + O₂ → 2 CO,how many moles of carbon are needed to produce 66.0 g of carbon monoxide?

How much Ca(NO₃) ₂ should be weighed out to have 0.650 mol?

The balanced equation given below means: CH₄ + 2 O₂ → CO₂ + 2H₂O

Quiz 6: Chemical Reactions: Mole and Mass Relationships

Determine the number of moles of water produced when one mole of NH3 reacts according to the balanced reaction shown. 4 NH3 + 5 O2 → 4 NO + 6 H2O

The percentage yield of a reaction can best be described as the ________ times 100%.

In the reaction shown,how many moles of HCl are needed to react with 2.4 moles of Al? 2 Al + 6 HCl → 2 AlCl3 + 3 H2

How many grams of C will be consumed when 5.00 grams of Na2SO4 react according to the balanced reaction shown? Na2SO4 + 2 C → Na2S + 2 CO2

In the balanced reaction shown,the mole ratio of Fe2S3 to O2 is Fe2S3 + 4 O2 → 2 FeO + 3 SO2

Interpret in words the equation: P4O10 (s) + 6 H2O (l) → 4 H3PO4 (aq)

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of H2 that would be produced when 3.5 moles of AlCI3 are produced? 2 Al + 6 HCl → 2 AlCI3 + 3 H2

The number of grams in 2.65 mol of SO2 is

How many grams of fluorine are required to produce 20.0 grams of FeF3 from the reaction shown? 2 Fe + 3F2 → 2 FeF3

The number of grams in 7.00 moles of N2 is ________.

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of oxygen needed to react with 3.2 moles of C4H10? 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

How many moles of CO2 are produced when 2.5 moles of O2 react according to the following equation? C3H5 + 5 O2 → 3 CO2 + 4 H2O

How many moles of NaHCO3 are present in a 2.00 g sample?

A student weighed 0.550 g of lithium chloride,LiCl,to use in a reaction.How many moles is this?

The following equation represents the formation of nitrogen dioxide,a major component of smog, 2 NO + O2 → 2 NO2 If 0.68 mole of NO is reacted with 0.79 mole of O2 to produce NO2,the limiting reactant is ________.

In the reaction 2 C + O2 → 2 CO,how many moles of carbon are needed to produce 66.0 g of carbon monoxide?

How much Ca(NO3) 2 should be weighed out to have 0.650 mol?

The balanced equation given below means: CH4 + 2 O2 → CO2 + 2H2O

Determine the number of moles of water produced when one mole of NH₃ reacts according to the balanced reaction shown. 4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

In the reaction shown,how many moles of HCl are needed to react with 2.4 moles of Al? 2 Al + 6 HCl → 2 AlCl₃ + 3 H₂

How many grams of C will be consumed when 5.00 grams of Na₂SO₄ react according to the balanced reaction shown? Na₂SO₄+ 2 C → Na₂S + 2 CO₂

In the balanced reaction shown,the mole ratio of Fe₂S₃ to O₂ is Fe₂S₃+ 4 O₂ → 2 FeO + 3 SO₂

Interpret in words the equation: P₄O₁₀ (s) + 6 H₂O (l) → 4 H₃PO₄ (aq)

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of H₂ that would be produced when 3.5 moles of AlCI₃ are produced? 2 Al + 6 HCl → 2 AlCI₃ + 3 H₂

The number of grams in 2.65 mol of SO₂ is

How many grams of fluorine are required to produce 20.0 grams of FeF₃ from the reaction shown? 2 Fe + 3F₂ → 2 FeF₃

The number of grams in 7.00 moles of N₂ is ________.

In the reaction shown,what is the mole ratio that would be used to determine the number of moles of oxygen needed to react with 3.2 moles of C₄H₁₀? 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

How many moles of CO₂ are produced when 2.5 moles of O₂ react according to the following equation? C₃H₅ + 5 O₂ → 3 CO₂ + 4 H₂O

How many moles of NaHCO₃ are present in a 2.00 g sample?

The following equation represents the formation of nitrogen dioxide,a major component of smog, 2 NO + O₂ → 2 NO₂ If 0.68 mole of NO is reacted with 0.79 mole of O₂ to produce NO₂,the limiting reactant is ________.

In the reaction 2 C + O₂ → 2 CO,how many moles of carbon are needed to produce 66.0 g of carbon monoxide?

How much Ca(NO₃) ₂ should be weighed out to have 0.650 mol?

The balanced equation given below means: CH₄ + 2 O₂ → CO₂ + 2H₂O