Question 1

What is the mass of chlorine in the ocean given the mass percent concentration of chlorine is 1.90%? (Assume the total volume of the oceans is 1.4 x 1021 L and the density of seawater is 1.05 g/mL. )

Accepted Answer

A)  2.8 x 1019 g
B)  2.8 x 1022 g
C)  2.8 x 1024 g
D)  7.7 x 1022 g
E)  7.7 x 1025 gF) A) and B)
G) B) and E)

Question 2

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the molarity of the ammonia solution?

Accepted Answer

A)  0.170 M
B)  0.235 M
C)  4.25 M
D)  5.88 M
E)  6.80 MF) B) and D)
G) C) and D)

Question 3

Given the three-step Contact process for manufacturing sulfuric acid,H₂SO₄: S(s) + O₂(g) → SO₂(g) 
2 SO₂(g) + O₂(g) → 2 SO₃(g) 
SO₃(g) + H₂O(l) → H₂SO₄(aq) 
What mass of sulfuric acid is produced from the reaction of 25.0 g of sulfur?

Accepted Answer

A)  8.18 g
B)  38.2 g
C)  76.4 g
D)  152 g
E)  306 gF) C) and E)
G) D) and E)

Question 4

Given that 25.0 mL of 0.100 M AgNO₃ reacts completely with 0.150 M k₂CrO₄,what volume of potassium chromate is required? AgNO₃(aq) + k₂CrO₄(aq) → Ag2CrO₄(s) + KNO₃(aq)

Accepted Answer

A)  8.33 mL
B)  16.7 mL
C)  33.3 mL
D)  37.5 mL
E)  75.0 mLF) A) and B)
G) C) and D)

Question 5

Given the three-step "blast furnace" process that converts iron ore,Fe₂O₃,into molten "pig iron": 3 Fe₂O₃(l) + CO(g) → 2 Fe₃O₄(l) + CO₂(g) 
Fe₃O₄(l) + CO(g) → 3 FeO(l) + CO₂(g) 
FeO(l) + CO(g) → Fe(l) + CO₂(g) 
How many moles of iron are produced from the reaction of 6.00 mol of Fe₂O₃?

Accepted Answer

A)  3.00 mol
B)  4.00 mol
C)  6.00 mol
D)  12.0 mol
E)  none of the aboveF) A) and B)
G) A) and C)

Question 6

Given the reaction for manufacturing hydrogen peroxide,H₂O₂,which in turn can react explosively with hydrazine: C₃H7OH(l) + O₂(g) → H₂O₂(l) + C₃H₆O(l) 
2 H₂O₂(l) + N₂H₄(l) → 3 N₂(g) + 4 H₂O(g) 
What mass of nitrogen is released in the two-step process if all the H₂O₂ fuel is produced from 1.00 L of isopropyl alcohol,C₃H7OH, (d = 0.786 g/mL) ?

Accepted Answer

A)  245 g
B)  367 g
C)  550 g
D)  594 g
E)  891 gF) D) and E)
G) B) and E)

Question 7

The amino acid lysine has the percent composition 49.3% C,9.59% H,19.2% N,and 21.9% O.If the molar mass is found to be 146 g/mol,what is the molecular formula of lysine?

Accepted Answer

A)  C₃H7NO
B)  C₃H7NO₂
C)  C₆H14NO₂
D)  C₆H14N₂O₂
E)  C₆H14N₂O₄F) C) and E)
G) B) and E)

Question 8

What is the term for the constant R in the equation PV = nRT?

Accepted Answer

A)  combined gas constant
B)  ideal gas constant
C)  real gas constant
D)  universal gas constant
E)  none of the aboveF) All of the above
G) C) and E)

Question 9

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the number of ammonia molecules dissolved in solution?

Accepted Answer

A)  7.08 x 1021
B)  1.77 x 1023
C)  7.08 x 1023
D)  2.05 x 1024
E)  5.12 x 1025F) B) and D)
G) D) and E)

Question 10

Which of the following units is an expression of volume?

Accepted Answer

A)  mg
B)  mL
C)  mm
D)  all of the above
E)  none of the aboveF) A) and E)
G) None of the above

Question 11

Which of the following illustrates the conversion of a mass of argon gas to volume of Ar at STP?

Accepted Answer

A)  g Ar → mol Ar → L Ar
B)  g Ar → L Ar → mol Ar
C)  L Ar → mol Ar → g Ar
D)  mol Ar → L Ar → g Ar
E)  mol Ar → g Ar → L ArF) B) and D)
G) A) and B)

Question 12

Given the three-step "blast furnace" process that converts iron ore,Fe₂O₃,into molten "pig iron": 3 Fe₂O₃(l) + CO(g) → 2 Fe₃O₄(l) + CO₂(g) 
Fe₃O₄(l) + CO(g) → 3 FeO(l) + CO₂(g) 
FeO(l) + CO(g) → Fe(l) + CO₂(g) 
What mass of iron is produced from 1.00 metric ton (1000 kg) of Fe₂O₃?

Accepted Answer

A)  175 kg
B)  699 kg
C)  1430 kg
D)  2860 kg
E)  5720 kgF) A) and E)
G) B) and E)

Question 13

If 100.0 mL of 0.150 M sodium nitrate is added to 50.0 mL of 0.150 M sodium carbonate,what is the resulting molar concentration of the sodium ion?

Accepted Answer

A)  0.100 M
B)  0.150 M
C)  0.200 M
D)  0.300 M
E)  0.600 MF) B) and E)
G) C) and D)

Question 14

If a 0.079-g sample of unknown metal (X) reacts with acid to give 66.0 mL of hydrogen gas at 22 °C and 732 mm Hg,what is the unknown metal? 2 X(s) + 6 HCl(aq) → 2 XCl3(aq) + 3 H₂(g)

Accepted Answer

A)  Al
B)  Cr
C)  Ga
D)  Fe
E)  ScF) C) and E)
G) B) and E)

Question 15

Which of the following problem-solving techniques can be applied to chemical calculations?

Accepted Answer

A)  algebra
B)  concept map
C)  unit analysis
D)  visualization
E)  all of the aboveF) A) and B)
G) B) and D)

Question 16

After carefully reading a chemistry problem,what is the third question to ask?

Accepted Answer

A)  What is the unknown quantity?
B)  What is the relevant given value?
C)  What steps are necessary to proceed from the given to the unknown?
D)  What units can be canceled?
E)  none of the aboveF) C) and E)
G) A) and C)

Question 17

What is the term for the substance in a chemical reaction that controls the maximum amount of product?

Accepted Answer

A)  limiting reactant
B)  limiting product
C)  maximum reactant
D)  maximum product
E)  none of the aboveF) A) and B)
G) A) and C)

Question 18

What problem-solving technique helps to understand concepts that cannot be observed directly,such as molecules in a gas?

Accepted Answer

A)  formation
B)  imagination
C)  revelation
D)  visualization
E)  none of the aboveF) A) and C)
G) A) and E)

Question 19

Given the three-step "blast furnace" process that converts iron ore,Fe₂O₃,into molten "pig iron": 3 Fe₂O₃(l) + CO(g) → 2 Fe₃O₄(l) + CO₂(g) 
Fe₃O₄(l) + CO(g) → 3 FeO(l) + CO₂(g) 
FeO(l) + CO(g) → Fe(l) + CO₂(g) 
How many moles of Fe₂O₃ are required to produce 6.00 mol of molten iron?

Accepted Answer

A)  3.00 mol
B)  4.00 mol
C)  6.00 mol
D)  12.0 mol
E)  none of the aboveF) B) and E)
G) A) and C)

Question 20

What is the term for the concentration expression that relates the moles of solute dissolved in each liter of solution?

Accepted Answer

A)  mass/mass percent (m/m %) 
B)  molarity (M) 
C)  molality (m) 
D)  parts per million (ppm) 
E)  none of the aboveF) A) and E)
G) D) and E)

Exam 15: Advanced Problem Solving

Which of the following illustrates the conversion of a mass of argon gas to volume of Ar at STP?

Correct Answer
verified

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the number of ammonia molecules dissolved in solution?

Correct Answer
verified

If a 0.079-g sample of unknown metal (X) reacts with acid to give 66.0 mL of hydrogen gas at 22 °C and 732 mm Hg,what is the unknown metal? 2 X(s) + 6 HCl(aq) → 2 XCl3(aq) + 3 H₂(g)

Correct Answer
verified

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the molarity of the ammonia solution?

Correct Answer
verified

Which of the following problem-solving techniques can be applied to chemical calculations?

Correct Answer
verified

After carefully reading a chemistry problem,what is the third question to ask?

Correct Answer
verified

Which of the following units is an expression of volume?

Correct Answer
verified

The amino acid lysine has the percent composition 49.3% C,9.59% H,19.2% N,and 21.9% O.If the molar mass is found to be 146 g/mol,what is the molecular formula of lysine?

Correct Answer
verified

What is the term for the substance in a chemical reaction that controls the maximum amount of product?

Correct Answer
verified

Given that 25.0 mL of 0.100 M AgNO₃ reacts completely with 0.150 M k₂CrO₄,what volume of potassium chromate is required? AgNO₃(aq) + k₂CrO₄(aq) → Ag2CrO₄(s) + KNO₃(aq)

Correct Answer
verified

What is the term for the constant R in the equation PV = nRT?

Correct Answer
verified

Given the three-step Contact process for manufacturing sulfuric acid,H₂SO₄: S(s) + O₂(g) → SO₂(g) 2 SO₂(g) + O₂(g) → 2 SO₃(g) SO₃(g) + H₂O(l) → H₂SO₄(aq) What mass of sulfuric acid is produced from the reaction of 25.0 g of sulfur?

Correct Answer
verified

Correct Answer
verified

What problem-solving technique helps to understand concepts that cannot be observed directly,such as molecules in a gas?

Correct Answer
verified

If 100.0 mL of 0.150 M sodium nitrate is added to 50.0 mL of 0.150 M sodium carbonate,what is the resulting molar concentration of the sodium ion?

Correct Answer
verified

Correct Answer
verified

What is the mass of chlorine in the ocean given the mass percent concentration of chlorine is 1.90%? (Assume the total volume of the oceans is 1.4 x 1021 L and the density of seawater is 1.05 g/mL. )

Correct Answer
verified

What is the term for the concentration expression that relates the moles of solute dissolved in each liter of solution?

Correct Answer
verified

Correct Answer
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Correct Answer
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Exam 15: Advanced Problem Solving

Which of the following illustrates the conversion of a mass of argon gas to volume of Ar at STP?

Correct AnswerverifiedShow Answer

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the number of ammonia molecules dissolved in solution?

Correct AnswerverifiedShow Answer

If a 0.079-g sample of unknown metal (X) reacts with acid to give 66.0 mL of hydrogen gas at 22 °C and 732 mm Hg,what is the unknown metal? 2 X(s) + 6 HCl(aq) → 2 XCl3(aq) + 3 H₂(g)

Correct AnswerverifiedShow Answer

If 5.00 g of ammonia,NH₃,is dissolved in 50.0 mL of aqueous solution,what is the molarity of the ammonia solution?

Correct AnswerverifiedShow Answer

Which of the following problem-solving techniques can be applied to chemical calculations?

Correct AnswerverifiedShow Answer

After carefully reading a chemistry problem,what is the third question to ask?

Correct AnswerverifiedShow Answer

Which of the following units is an expression of volume?

Correct AnswerverifiedShow Answer

The amino acid lysine has the percent composition 49.3% C,9.59% H,19.2% N,and 21.9% O.If the molar mass is found to be 146 g/mol,what is the molecular formula of lysine?

Correct AnswerverifiedShow Answer

What is the term for the substance in a chemical reaction that controls the maximum amount of product?

Correct AnswerverifiedShow Answer

Given that 25.0 mL of 0.100 M AgNO₃ reacts completely with 0.150 M k₂CrO₄,what volume of potassium chromate is required? AgNO₃(aq) + k₂CrO₄(aq) → Ag2CrO₄(s) + KNO₃(aq)

Correct AnswerverifiedShow Answer

What is the term for the constant R in the equation PV = nRT?

Correct AnswerverifiedShow Answer

Given the three-step Contact process for manufacturing sulfuric acid,H₂SO₄: S(s) + O₂(g) → SO₂(g) 2 SO₂(g) + O₂(g) → 2 SO₃(g) SO₃(g) + H₂O(l) → H₂SO₄(aq) What mass of sulfuric acid is produced from the reaction of 25.0 g of sulfur?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What problem-solving technique helps to understand concepts that cannot be observed directly,such as molecules in a gas?

Correct AnswerverifiedShow Answer

If 100.0 mL of 0.150 M sodium nitrate is added to 50.0 mL of 0.150 M sodium carbonate,what is the resulting molar concentration of the sodium ion?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the mass of chlorine in the ocean given the mass percent concentration of chlorine is 1.90%? (Assume the total volume of the oceans is 1.4 x 1021 L and the density of seawater is 1.05 g/mL. )

Correct AnswerverifiedShow Answer

What is the term for the concentration expression that relates the moles of solute dissolved in each liter of solution?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
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