Question 1

How many moles of water, H2O, are present in 75.0 g of H2O?

Accepted Answer

A) 4.41 moles 
B) 4.16 moles 
C) 75.0 moles 
D) 7.50 moles 
E) 1.35 × 103 moles 
A) 4.41 moles 
B) 4.16 moles 
C) 75.0 moles 
D) 7.50 moles 
E) 1.35 × 103 moles

Question 2

What is the molar mass of Mg₃(PO₄)₂ , a substance formerly used in medicine as an antacid?

Accepted Answer

A) 71.3 g 
B) 118 g 
C) 150. g 
D) 214 g 
E) 263 g 
A) 71.3 g 
B) 118 g 
C) 150. g 
D) 214 g 
E) 263 g

Question 3

Barium chloride and sodium sulfate react according to the following equation.
BaCl₂ + NaS1U1B12S1U1B0SO₄ → BaSO₄ + 2NaCl
Answer the question(s) that follow about this reaction.
-How many grams of barium sulfate can be produced from 20.8 g of barium chloride?

Accepted Answer

A) 1.37 g 
B) 2.33 g 
C) 23.3 g 
D) 137 g 
E) 233 g 
A) 1.37 g 
B) 2.33 g 
C) 23.3 g 
D) 137 g 
E) 233 g

Question 4

When 3.05 moles of CH₄ are mixed with 5.03 moles of O2 the limiting reactant is CH₄ + 2O2 → CO2 + 2H2O

Accepted Answer

A) CH₄ 
B) O2. 
C) CO2. 
D) H2O. 
A) CH₄ 
B) O2. 
C) CO2. 
D) H2O.

Question 5

In the reaction of hydrogen gas with oxygen gas to produce water, 1 mole of oxygen gas can produce 2 moles of water, given sufficient hydrogen available.

Accepted Answer

A) True 
 B)False

Question 6

What is the molar mass of sucrose (C12H22O11)?

Accepted Answer

A) 29.0 g 
B) 50.2 g 
C) 210 g 
D) 342 g 
E) 182 g 
A) 29.0 g 
B) 50.2 g 
C) 210 g 
D) 342 g 
E) 182 g

Question 7

The % yield is the ratio of the theoretical yield to the actual yield multiplied by 100.

Accepted Answer

A) True 
 B)False

Question 8

The molar mass of chlorine gas is 35.5 g.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is an oxidation-reduction reaction?

Accepted Answer

A) CaCl₂+ Na2SO₄→ CaSO₄+ 2NaCl 
B) KOH + HNO₃→ H2O + KNO₃ 
C) N2 + O2 → 2NO 
D) AgNO₃+ NaCl → AgCl + NaNO₃ 
E) Al2(SO₄)3 + 6KOH → 2Al(OH)3 + 3K₂SO₄ 
A) CaCl₂+ Na2SO₄→ CaSO₄+ 2NaCl 
B) KOH + HNO₃→ H2O + KNO₃ 
C) N2 + O2 → 2NO 
D) AgNO₃+ NaCl → AgCl + NaNO₃ 
E) Al2(SO₄)3 + 6KOH → 2Al(OH)3 + 3K₂SO₄

Question 10

In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below. AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

Accepted Answer

A) 107.9 g 
B) 169.9 g 
C) 84.4 g 
D) 0.589 g 
E) 58.9 g 
A) 107.9 g 
B) 169.9 g 
C) 84.4 g 
D) 0.589 g 
E) 58.9 g

Question 11

For the question(s) that follow, consider the following equation.
2Mg + OS1U1B12S1U1B0 → 2MgO
-How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?

Accepted Answer

A) 30.4 g 
B) 50.4 g 
C) 60.8 g 
D) 101 g 
E) 201 g 
A) 30.4 g 
B) 50.4 g 
C) 60.8 g 
D) 101 g 
E) 201 g

Question 12

Answer the question(s) that follow about the following reaction.
2HS1U1B12S1U1B0OS1U1B12S1U1B0 → 2HS1U1B12S1U1B0O + OS1U1B12S1U1B0
-How many grams of water will 100. grams of hydrogen peroxide (H2O2) produce?

Accepted Answer

A) 3600 g 
B) 360. g 
C) 5.88 g 
D) 52.9 g 
E) 106 g 
A) 3600 g 
B) 360. g 
C) 5.88 g 
D) 52.9 g 
E) 106 g

Question 13

How many grams of glucose (C6H12O6) are in 3.55 moles of glucose?

Accepted Answer

A) 180. g 
B) 639 g 
C) 103 g 
D) 426 g 
E) 50.7 g 
A) 180. g 
B) 639 g 
C) 103 g 
D) 426 g 
E) 50.7 g

Question 14

What type of reaction is: CH₄ + 2O2 → CO2 + 2H2O + 218 kcal?

Accepted Answer

A) an endothermic reaction 
B) an exothermic reaction 
C) a single replacement reaction 
D) a combination reaction 
E) a decomposition reaction 
A) an endothermic reaction 
B) an exothermic reaction 
C) a single replacement reaction 
D) a combination reaction 
E) a decomposition reaction

Question 15

The ________ is the energy difference between reactants and products in a chemical reaction.

Accepted Answer

A) transition energy 
B) activation energy 
C) product energy 
D) overall energy 
E) heat of reaction 
A) transition energy 
B) activation energy 
C) product energy 
D) overall energy 
E) heat of reaction

Question 16

One mole of neon atoms has a mass of

Accepted Answer

A) 6.02 × 1023 grams. 
B) 14.0 g. 
C) 10.0 g. 
D) 20.2 g. 
E) 30.2 g. 
A) 6.02 × 1023 grams. 
B) 14.0 g. 
C) 10.0 g. 
D) 20.2 g. 
E) 30.2 g.

Question 17

For the reaction: 2H2O(l) + 137 kcal → 2H2 (g) + O2 (g), how many kcal are needed to react 50.0 g H2O(l)?

Accepted Answer

A) 380. kcal 
B) 137 kcal 
C) 274 kcal 
D) 190. kcal 
E) 760. kcal 
A) 380. kcal 
B) 137 kcal 
C) 274 kcal 
D) 190. kcal 
E) 760. kcal

Question 18

The molar mass of calcium hydroxide, Ca(OH)₂ , is

Accepted Answer

A) 58.1 g. 
B) 57.1 g. 
C) 74.1 g. 
D) 114.2 g. 
E) 38.0 g. 
A) 58.1 g. 
B) 57.1 g. 
C) 74.1 g. 
D) 114.2 g. 
E) 38.0 g.

Question 19

Answer the question(s) that follow about the following reaction.
2HS1U1B12S1U1B0OS1U1B12S1U1B0 → 2HS1U1B12S1U1B0O + OS1U1B12S1U1B0
-How many grams of hydrogen peroxide (H2O2) are needed to produce 25.0 g of oxygen?

Accepted Answer

A) 106 g 
B) 26.6 g 
C) 5.88 g 
D) 25.0 g 
E) 53.1 g 
A) 106 g 
B) 26.6 g 
C) 5.88 g 
D) 25.0 g 
E) 53.1 g

Question 20

In this reaction, what is the correct coefficient for hydrogen gas? 
? H2 + ? O2 → ? H2O

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Exam 7: Chemical Reactions and Quantities

How many moles of water, H2O, are present in 75.0 g of H2O?

What is the molar mass of Mg₃(PO₄)₂ , a substance formerly used in medicine as an antacid?

Barium chloride and sodium sulfate react according to the following equation. BaCl₂ + Na2SO₄ → BaSO₄ + 2NaCl Answer the question(s) that follow about this reaction. -How many grams of barium sulfate can be produced from 20.8 g of barium chloride?

When 3.05 moles of CH₄ are mixed with 5.03 moles of O2 the limiting reactant is CH₄ + 2O2 → CO2 + 2H2O

In the reaction of hydrogen gas with oxygen gas to produce water, 1 mole of oxygen gas can produce 2 moles of water, given sufficient hydrogen available.

What is the molar mass of sucrose (C12H22O11)?

The % yield is the ratio of the theoretical yield to the actual yield multiplied by 100.

The molar mass of chlorine gas is 35.5 g.

Which of the following is an oxidation-reduction reaction?

In the reaction of silver nitrate with sodium chloride, how many grams of silver chloride will be produced from 100. g of silver nitrate when it is mixed with an excess of sodium chloride? The equation for the reaction is below. AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)

For the question(s) that follow, consider the following equation. 2Mg + O2 → 2MgO -How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg?

Answer the question(s) that follow about the following reaction. 2H2O2 → 2H2O + O2 -How many grams of water will 100. grams of hydrogen peroxide (H2O2) produce?

How many grams of glucose (C6H12O6) are in 3.55 moles of glucose?

What type of reaction is: CH₄ + 2O2 → CO2 + 2H2O + 218 kcal?

The ________ is the energy difference between reactants and products in a chemical reaction.

One mole of neon atoms has a mass of

For the reaction: 2H2O(l) + 137 kcal → 2H2 (g) + O2 (g), how many kcal are needed to react 50.0 g H2O(l)?

The molar mass of calcium hydroxide, Ca(OH)₂ , is

Answer the question(s) that follow about the following reaction. 2H2O2 → 2H2O + O2 -How many grams of hydrogen peroxide (H2O2) are needed to produce 25.0 g of oxygen?

In this reaction, what is the correct coefficient for hydrogen gas? ? H2 + ? O2 → ? H2O

Chemistry in Our Lives

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Introduction to Organic Chemistry: Hydrocarbons

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How many moles of water, H₂O, are present in 75.0 g of H₂O?

Barium chloride and sodium sulfate react according to the following equation. BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl Answer the question(s) that follow about this reaction. -How many grams of barium sulfate can be produced from 20.8 g of barium chloride?

When 3.05 moles of CH₄ are mixed with 5.03 moles of O₂the limiting reactant is CH₄ + 2O₂→ CO₂ + 2H₂O

What is the molar mass of sucrose (C₁₂H₂₂O₁₁)?

For the question(s) that follow, consider the following equation. 2Mg + O₂ → 2MgO -How many grams of MgO are produced when 40.0 grams of O₂ react completely with Mg?

Answer the question(s) that follow about the following reaction. 2H₂O₂ → 2H₂O + O₂ -How many grams of water will 100. grams of hydrogen peroxide (H₂O₂) produce?

How many grams of glucose (C₆H₁₂O₆) are in 3.55 moles of glucose?

What type of reaction is: CH₄ + 2O₂ → CO₂ + 2H₂O + 218 kcal?

For the reaction: 2H₂O(l) + 137 kcal → 2H₂ (g) + O₂ (g), how many kcal are needed to react 50.0 g H₂O(l)?

Answer the question(s) that follow about the following reaction. 2H₂O₂ → 2H₂O + O₂ -How many grams of hydrogen peroxide (H₂O₂) are needed to produce 25.0 g of oxygen?

In this reaction, what is the correct coefficient for hydrogen gas? ? H₂ + ? O₂ → ? H₂O