Question 1

The number of grams in 0.350 mol of Na is

Accepted Answer

A) 0.350. 
B) 8.05. 
C) 11.0. 
D) 23.0. 
E) 65.7.

Question 2

Match the following.
-The molar mass of

Accepted Answer

A) 212.4 g 
B) 219 g 
C) 225 g 
D) 208.2 g

Question 3

The molar mass of butane,C4H10,is ________ grams.

Accepted Answer

A) 22.01 
B) 49.05 
C) 52.08 
D) 58.12 
E) 68.24

Question 4

42.0 g Cl2 contains ________ molecules Cl2.

Accepted Answer

A) 1.18 
B) 3.57 × 1023 
C) 6.75 × 1023 
D) 1.78 × 1023 
E) 0.592

Question 5

Which statement concerning the mole concept is not true?

Accepted Answer

A) The molar mass of a metal is its atomic weight expressed in grams. 
B) The mole concept makes a connection between the mass of a substance and the number of particles or units of that substance. 
C) One mole of any compound contains one mole of atoms. 
D) One mole of sodium contains the same number of atoms as one mole of carbon. 
E) One mole of water contains the same number of molecules as one mole of ammonia.

Question 6

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

A) 4.49 g 
B) 5.05 g 
C) 6.74 g 
D) 10.1 g 
E) 20.2 g

Question 7

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

A) 1.5 
B) 3.0 
C) 5.0 
D) 6.0 
E) 18

Question 8

The molar mass of Fe(OH)3 is ________ g.

Accepted Answer

A) 72.86 
B) 74.88 
C) 89.87 
D) 104.86 
E) 106.87

Question 9

A thimble of water contains 4.0 × 1021molecules.The number of moles of H2O is

Accepted Answer

A) 2.4 × 1045. 
B) 6.6 × 10-3. 
C) 6.6 × 10-23. 
D) 2.4 × 1023. 
E) 2.4 × 10-23.

Question 10

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

Accepted Answer

A) 77.08 
B) 42.39 
C) 23.31 
D) 5.11 
E) 0.0130

Question 11

Calculate the number of moles of aspirin,C9H8O4,in 4.0 gram sample.

Accepted Answer

A) 2.2 × 10-4 moles 
B) 2.2 moles 
C) 4.6 × 10-3 moles 
D) 0.022 moles 
E) 180 moles

Question 12

How many molecules are there in 3.00 moles of NH3?

Accepted Answer

A) 1.00 molecules 
B) 3.00 molecules 
C) 17.00 molecules 
D) 1.20 × 1024 molecules 
E) 1.81 × 1024 molecules

Question 13

The formula weight of ammonium carbonate, (NH4)2CO3 is ________ amu.

Accepted Answer

A) 64.11 
B) 82.10 
C) 96.09 
D) 120.13 
E) 180.17

Question 14

105 g of MgCl2 contains ________ mol MgCl2.

Accepted Answer

A) 105 
B) 6.62 × 1023 
C) 1.10 
D) 1.76 
E) 1.06 × 1024

Question 15

The active ingredient in many antacid tablets is calcium carbonate,CaCO3.How many moles of calcium carbonate are contained in a tablet weighing 550.mg?

Accepted Answer

A) 5.51 
B) 55.1 
C) 5.51 × 10-3 
D) 5.51 × 10-4 
E) 5.51 × 104

Question 16

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

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 17

The Haber process is used to make ammonia,which is an important source of nitrogen that can be metabolized by plants.Using the equation below,determine how many kilograms of ammonia will be formed from 89.5 kg of hydrogen.
N2(g)+ 3H2(g)→ 2NH3(g)

Accepted Answer

A) 5.02 × 105 kg 
B) 1130 kg 
C) 1.74 kg 
D) 2050 kg 
E) 502 kg

Question 18

The number of grams in 2.65 mol of SO2 is

Accepted Answer

A) 2.65. 
B) 64.1. 
C) 24.2. 
D) 170. 
E) 1.60 × 1024.

Question 19

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)→ 2 NO(g). A)How...

Question 20

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

A) 0.038 g 
B) 0.211 g 
C) 0.844 g 
D) 1.69 g 
E) 17.1 g

Exam 6: Chemical Reactions: Mole and Mass Relationships

The number of grams in 0.350 mol of Na is

Match the following. -The molar mass of

The molar mass of butane,C₄H₁₀,is ________ grams.

42.0 g Cl₂ contains ________ molecules Cl₂.

Which statement concerning the mole concept is not true?

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

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

The molar mass of Fe(OH) ₃ is ________ g.

A thimble of water contains 4.0 × 10²¹molecules.The number of moles of H₂O is

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

Calculate the number of moles of aspirin,C₉H₈O₄,in 4.0 gram sample.

How many molecules are there in 3.00 moles of NH₃?

The formula weight of ammonium carbonate, (NH₄) ₂CO₃ is ________ amu.

105 g of MgCl₂ contains ________ mol MgCl₂.

The active ingredient in many antacid tablets is calcium carbonate,CaCO₃.How many moles of calcium carbonate are contained in a tablet weighing 550.mg?

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

The Haber process is used to make ammonia,which is an important source of nitrogen that can be metabolized by plants.Using the equation below,determine how many kilograms of ammonia will be formed from 89.5 kg of hydrogen. N₂(g) + 3H₂(g) → 2NH₃(g)

The number of grams in 2.65 mol of SO₂ is

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

Exam 6: Chemical Reactions: Mole and Mass Relationships

The number of grams in 0.350 mol of Na is

Match the following. -The molar mass of

The molar mass of butane,C4H10,is ________ grams.

42.0 g Cl2 contains ________ molecules Cl2.

Which statement concerning the mole concept is not true?

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

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

The molar mass of Fe(OH) 3 is ________ g.

A thimble of water contains 4.0 × 1021molecules.The number of moles of H2O is

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

Calculate the number of moles of aspirin,C9H8O4,in 4.0 gram sample.

How many molecules are there in 3.00 moles of NH3?

The formula weight of ammonium carbonate, (NH4) 2CO3 is ________ amu.

105 g of MgCl2 contains ________ mol MgCl2.

The active ingredient in many antacid tablets is calcium carbonate,CaCO3.How many moles of calcium carbonate are contained in a tablet weighing 550.mg?

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

The Haber process is used to make ammonia,which is an important source of nitrogen that can be metabolized by plants.Using the equation below,determine how many kilograms of ammonia will be formed from 89.5 kg of hydrogen. N2(g) + 3H2(g) → 2NH3(g)

The number of grams in 2.65 mol of SO2 is

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

The molar mass of butane,C₄H₁₀,is ________ grams.

42.0 g Cl₂ contains ________ molecules Cl₂.

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

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

The molar mass of Fe(OH) ₃ is ________ g.

A thimble of water contains 4.0 × 10²¹molecules.The number of moles of H₂O is

Calculate the number of moles of aspirin,C₉H₈O₄,in 4.0 gram sample.

How many molecules are there in 3.00 moles of NH₃?

The formula weight of ammonium carbonate, (NH₄) ₂CO₃ is ________ amu.

105 g of MgCl₂ contains ________ mol MgCl₂.

The active ingredient in many antacid tablets is calcium carbonate,CaCO₃.How many moles of calcium carbonate are contained in a tablet weighing 550.mg?

The Haber process is used to make ammonia,which is an important source of nitrogen that can be metabolized by plants.Using the equation below,determine how many kilograms of ammonia will be formed from 89.5 kg of hydrogen. N₂(g) + 3H₂(g) → 2NH₃(g)

The number of grams in 2.65 mol of SO₂ is

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