Question 1

Determine the oxidation state of nitrogen in LiNO3.

Accepted Answer

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

Question 2

Which of the following is a gas-evolution reaction?

Accepted Answer

A)  2 C2H6(l) + 7 O2(g) → 4 CO2(g) + 6 H2O(g) 
B)  2 H2(g) + O2(g) → 2 H2O(g) 
C)  KCl(aq) + NaNO3(aq) → KNO3(aq) + NaCl(s) 
D)  NH4Br(aq) + KOH(aq) → KBr(aq) + NH3(g) + H2O(l) 
E)  None of the above is a gas-evolution reaction. 
A)  2 C2H6(l) + 7 O2(g) → 4 CO2(g) + 6 H2O(g) 
B)  2 H2(g) + O2(g) → 2 H2O(g) 
C)  KCl(aq) + NaNO3(aq) → KNO3(aq) + NaCl(s) 
D)  NH4Br(aq) + KOH(aq) → KBr(aq) + NH3(g) + H2O(l) 
E)  None of the above is a gas-evolution reaction.

Question 3

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+   (g)→ 2 Li3N(s)
How many moles of lithium are needed to produce 0.31 mol of   N when the reaction is carried out in the presence of excess nitrogen?

Accepted Answer

A)  0.16 
B)  0.93 
C)  0.10 
D)  0.21 
E)  1.9 
A)  0.16 
B)  0.93 
C)  0.10 
D)  0.21 
E)  1.9

Question 4

How many milliliters of 0.260 M Na2S are needed to react with 35.00 mL of 0.315 M AgNO3? Na2S(aq)+ 2 AgNO3(aq)→ 2 NaNO3(aq)+ Ag2S(s)

Accepted Answer

A)  21.2 mL 
B)  42.4 mL 
C)  57.8 mL 
D)  84.8 mL 
A)  21.2 mL 
B)  42.4 mL 
C)  57.8 mL 
D)  84.8 mL

Question 5

How many grams of H2 gas can be produced by the reaction of 63.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below? 2 Al(s)+ 6 HCl(aq)→ 2 AlCl3(aq)+ 3 H2(g)

Accepted Answer

A)  3.13 g 
B)  4.71 g 
C)  7.06 g 
D)  14.1 g 
A)  3.13 g 
B)  4.71 g 
C)  7.06 g 
D)  14.1 g

Question 6

If the percent yield for the following reaction is 75.0%,and 35.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq)are produced? 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

Accepted Answer

A)  24.0 g 
B)  31.9 g 
C)  42.6 g 
D)  53.9 g 
A)  24.0 g 
B)  31.9 g 
C)  42.6 g 
D)  53.9 g

Question 7

What is the concentration of FeCl3 in a solution prepared by dissolving 10.0 g of FeCl3 in enough water to make 275 mL of solution?

Accepted Answer

A)  2.24 × 10-4 M 
B)  0.224 M 
C)  4.46 M 
D)  4.46 × 103 M 
A)  2.24 × 10-4 M 
B)  0.224 M 
C)  4.46 M 
D)  4.46 × 103 M

Question 8

Identify acetic acid.

Accepted Answer

A)  strong electrolyte, weak acid 
B)  weak electrolyte, weak acid 
C)  strong electrolyte, strong acid 
D)  weak electrolyte, strong acid 
E)  nonelectrolyte 
A)  strong electrolyte, weak acid 
B)  weak electrolyte, weak acid 
C)  strong electrolyte, strong acid 
D)  weak electrolyte, strong acid 
E)  nonelectrolyte

Question 9

How many milliliters of a 0.266 M KNO3 solution are required to make 150.0 mL of 0.075 M KNO3 solution?

Accepted Answer

A)  53.2 mL 
B)  42.3 mL 
C)  18.8 mL 
D)  23.6 mL 
E)  35.1 mL 
A)  53.2 mL 
B)  42.3 mL 
C)  18.8 mL 
D)  23.6 mL 
E)  35.1 mL

Question 10

How many grams of AgNO3 are needed to make 250.mL of a solution that is 0.140 M?

Accepted Answer

A)  0.0951 g 
B)  0.168 g 
C)  5.95 g 
D)  95.1 g 
A)  0.0951 g 
B)  0.168 g 
C)  5.95 g 
D)  95.1 g

Question 11

Identify perchloric acid.

Accepted Answer

A)  strong electrolyte, weak acid 
B)  weak electrolyte, weak acid 
C)  strong electrolyte, strong acid 
D)  weak electrolyte, strong acid 
E)  nonelectrolyte 
A)  strong electrolyte, weak acid 
B)  weak electrolyte, weak acid 
C)  strong electrolyte, strong acid 
D)  weak electrolyte, strong acid 
E)  nonelectrolyte

Question 12

Determine the oxidation state of P in PO33-.

Accepted Answer

A)  +3 
B)  +6 
C)  +2 
D)  0 
E)  -3 
A)  +3 
B)  +6 
C)  +2 
D)  0 
E)  -3

Question 13

Consider the following balanced reaction.What mass (in g)of CO2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present. C3H7SH(l)+ 6 O2(g)→ 3 CO2(g)+ SO2(g)+ 4 H2O(g)

Accepted Answer

A)  0.396 g CO2 
B)  0.209 g CO2 
C)  0.792 g CO2 
D)  0.126 g CO2 
E)  0.198 g CO2 
A)  0.396 g CO2 
B)  0.209 g CO2 
C)  0.792 g CO2 
D)  0.126 g CO2 
E)  0.198 g CO2

Question 14

How many milliliters of 0.111 M HClO4 solution are needed to neutralize 50.00 mL of 0.0789 M NaOH?

Accepted Answer

A)  0.438 
B)  0.0142 
C)  70.3 
D)  0.0281 
E)  35.5 
A)  0.438 
B)  0.0142 
C)  70.3 
D)  0.0281 
E)  35.5

Question 15

How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution?

Accepted Answer

A)  4.32 × 10-2 mol 
B)  2.32 × 10-2 mol 
C)  6.95 × 10-2 mol 
D)  1.44 × 10-2 mol 
E)  5.26 × 10-2 mol 
A)  4.32 × 10-2 mol 
B)  2.32 × 10-2 mol 
C)  6.95 × 10-2 mol 
D)  1.44 × 10-2 mol 
E)  5.26 × 10-2 mol

Question 16

What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4 solution? Hint: You will want to write a balanced reaction.

Accepted Answer

A)  581 mL 
B)  173 mL 
C)  345 mL 
D)  139 mL 
E)  278 mL 
A)  581 mL 
B)  173 mL 
C)  345 mL 
D)  139 mL 
E)  278 mL

Question 17

What are the coefficients in front of NO3-(aq)and Ni(s)when the following redox equation is balanced in an acidic solution? ____ NO3-(aq)+ ____ Ni(s)→ ____ NO(g)+ ____ Ni2+(aq)

Accepted Answer

A)  2, 3 
B)  2, 6 
C)  3, 4 
D)  3, 6 
A)  2, 3 
B)  2, 6 
C)  3, 4 
D)  3, 6

Question 18

According to the balanced equation shown below,3.00 moles of oxalic acid,H2C2O4,react with ________ moles of permanganate,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

Accepted Answer

A)  1.20 
B)  3.00 
C)  6.00 
D)  7.75 
A)  1.20 
B)  3.00 
C)  6.00 
D)  7.75

Question 19

When 15.6 mL of 0.500 M AgNO3 is added to 12.5 mL of 0.300 M NH4Cl,how many grams of AgCl are formed? AgNO3(aq)+ NH4Cl(aq)→ AgCl(s)+ NH4NO3(aq)

Accepted Answer

A)  0.537 g 
B)  1.11 g 
C)  1.65 g 
D)  3.22 g 
A)  0.537 g 
B)  1.11 g 
C)  1.65 g 
D)  3.22 g

Question 20

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s)+ H2O(l)→ Ca(OH)2(s)
A 1)00-g sample of CaO is reacted with 0.965 g of H2O.How many grams of water remain after the reaction is complete?

Accepted Answer

A)  0.00 
B)  0.00198 
C)  0.644 
D)  1.04 
E)  0.0357 
A)  0.00 
B)  0.00198 
C)  0.644 
D)  1.04 
E)  0.0357

Exam 4: Chemical Quantities and Aqueous Reactions

Determine the oxidation state of nitrogen in LiNO3.

Which of the following is a gas-evolution reaction?

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li3N(s) How many moles of lithium are needed to produce 0.31 mol of N when the reaction is carried out in the presence of excess nitrogen?

How many milliliters of 0.260 M Na2S are needed to react with 35.00 mL of 0.315 M AgNO3? Na2S(aq)+ 2 AgNO3(aq)→ 2 NaNO3(aq)+ Ag2S(s)

How many grams of H2 gas can be produced by the reaction of 63.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below? 2 Al(s)+ 6 HCl(aq)→ 2 AlCl3(aq)+ 3 H2(g)

If the percent yield for the following reaction is 75.0%,and 35.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq)are produced? 3 NO2(g)+ H2O(l)→ 2 HNO3(aq)+ NO(g)

What is the concentration of FeCl3 in a solution prepared by dissolving 10.0 g of FeCl3 in enough water to make 275 mL of solution?

Identify acetic acid.

How many milliliters of a 0.266 M KNO3 solution are required to make 150.0 mL of 0.075 M KNO3 solution?

How many grams of AgNO3 are needed to make 250.mL of a solution that is 0.140 M?

Identify perchloric acid.

Determine the oxidation state of P in PO33-.

Consider the following balanced reaction.What mass (in g)of CO2 can be formed from 288 mg of O2? Assume that there is excess C3H7SH present. C3H7SH(l)+ 6 O2(g)→ 3 CO2(g)+ SO2(g)+ 4 H2O(g)

How many milliliters of 0.111 M HClO4 solution are needed to neutralize 50.00 mL of 0.0789 M NaOH?

How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution?

What volume of 0.305 M AgNO3 is required to react exactly with 155.0 mL of 0.274 M Na2SO4 solution? Hint: You will want to write a balanced reaction.

What are the coefficients in front of NO3-(aq)and Ni(s)when the following redox equation is balanced in an acidic solution? ____ NO3-(aq)+ ____ Ni(s)→ ____ NO(g)+ ____ Ni2+(aq)

According to the balanced equation shown below,3.00 moles of oxalic acid,H2C2O4,react with ________ moles of permanganate,MnO4-. 5 H2C2O4(aq)+ 2 MnO4-(aq)+ 6 H+aq)→ 10 CO2(g)+ Mn2+(aq)+ 8 H2O(l)

When 15.6 mL of 0.500 M AgNO3 is added to 12.5 mL of 0.300 M NH4Cl,how many grams of AgCl are formed? AgNO3(aq)+ NH4Cl(aq)→ AgCl(s)+ NH4NO3(aq)

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s)+ H2O(l)→ Ca(OH)2(s) A 1)00-g sample of CaO is reacted with 0.965 g of H2O.How many grams of water remain after the reaction is complete?

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Determine the oxidation state of nitrogen in LiNO₃.

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6 Li(s)+ (g)→ 2 Li₃N(s) How many moles of lithium are needed to produce 0.31 mol of N when the reaction is carried out in the presence of excess nitrogen?

How many milliliters of 0.260 M Na₂S are needed to react with 35.00 mL of 0.315 M AgNO₃? Na₂S(aq)+ 2 AgNO₃(aq)→ 2 NaNO₃(aq)+ Ag₂S(s)

How many grams of H₂ gas can be produced by the reaction of 63.0 grams of Al(s)with an excess of dilute hydrochloric acid in the reaction shown below? 2 Al(s)+ 6 HCl(aq)→ 2 AlCl₃(aq)+ 3 H₂(g)

If the percent yield for the following reaction is 75.0%,and 35.0 g of NO₂ are consumed in the reaction,how many grams of nitric acid,HNO₃(aq)are produced? 3 NO₂(g)+ H₂O(l)→ 2 HNO₃(aq)+ NO(g)

What is the concentration of FeCl₃ in a solution prepared by dissolving 10.0 g of FeCl₃ in enough water to make 275 mL of solution?

How many milliliters of a 0.266 M KNO₃ solution are required to make 150.0 mL of 0.075 M KNO₃ solution?

How many grams of AgNO₃ are needed to make 250.mL of a solution that is 0.140 M?

Determine the oxidation state of P in PO₃^3-.

Consider the following balanced reaction.What mass (in g)of CO₂ can be formed from 288 mg of O₂? Assume that there is excess C₃H₇SH present. C₃H₇SH(l)+ 6 O₂(g)→ 3 CO₂(g)+ SO₂(g)+ 4 H₂O(g)

How many milliliters of 0.111 M HClO₄ solution are needed to neutralize 50.00 mL of 0.0789 M NaOH?

How many moles of CH₃CH₂OH are contained in 548 mL of 0.0788 M CH₃CH₂OH solution?

What volume of 0.305 M AgNO₃ is required to react exactly with 155.0 mL of 0.274 M Na₂SO₄ solution? Hint: You will want to write a balanced reaction.

What are the coefficients in front of NO₃^-(aq)and Ni(s)when the following redox equation is balanced in an acidic solution? NO₃^-(aq)+ Ni(s)→ NO(g)+ Ni²⁺(aq)

According to the balanced equation shown below,3.00 moles of oxalic acid,H₂C₂O₄,react with ________ moles of permanganate,MnO₄^-. 5 H₂C₂O₄(aq)+ 2 MnO₄^-(aq)+ 6 H⁺^aq)→ 10 CO₂(g)+ Mn²⁺(aq)+ 8 H₂O(l)

When 15.6 mL of 0.500 M AgNO₃ is added to 12.5 mL of 0.300 M NH₄Cl,how many grams of AgCl are formed? AgNO₃(aq)+ NH₄Cl(aq)→ AgCl(s)+ NH₄NO₃(aq)

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s)+ H₂O(l)→ Ca(OH)₂(s) A 1)00-g sample of CaO is reacted with 0.965 g of H₂O.How many grams of water remain after the reaction is complete?