Question 1

A mass of 0.4113 g of an unknown acid,HA,is titrated with NaOH.If the acid reacts with 28.10 mL of 0.1055 M NaOH(aq) ,what is the molar mass of the acid?

Accepted Answer

A)   2.965  ×	imes×  10-3 g/mol
B)   9.128 g/mol
C)   138.7 g/mol
D)   337.3 g/mol
E)   820.7 g/mol F) C) and D)
G) A) and E)

Question 2

If the complete combustion of an unknown mass of ethylene produces 16.0 g CO2,what mass of ethylene is combusted?
C2H4(g) + 3 O2(g)  →	o→  2 CO2(g) + 2 H2O(g)

Accepted Answer

A)   0.182 g
B)   0.364 g
C)   5.10 g
D)   8.00 g
E)   12.6 g F) C) and E)
G) A) and D)

Question 3

The empirical formula of ethylene is CH2.An experimental determination of the molar mass of ethylene yields the value of 28 g/mol.What is the   molecular ‾\underline{	ext{  molecular  }} molecular ​  formula of ethylene?

Accepted Answer

A)   C5H10
B)   CH2
C)   C2H4
D)   C3H8
E)   C6H9 F) A) and B)
G) A) and E)

Question 4

A 3.361 g sample of a hydrocarbon is burned in an excess of dioxygen,producing 6.295 g CO2 and 3.866 g H2O.What is the empirical formula of the hydrocarbon?

Accepted Answer

A)   CH3
B)   CH2
C)   C2H3
D)   CH4
E)   CHF) B) and E)
G) A) and D)

Question 5

What is the molarity of an NaI solution that contains 5.3 g of NaI in 41.0 mL of solution?

Accepted Answer

A)   0.86 M
B)   0.035 M
C)   0.0077 M
D)   0.00027 M
E)   0.13 MF) A) and B)
G) All of the above

Question 6

Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas.S8(s) + 24 F2(g)  →	o→  8 SF6(g) 
What is the percent yield if 18.3 g SF6 is isolated from the reaction of 10.0 g S8 and 30.0 g F2?

Accepted Answer

A)   40.2%
B)   45.8%
C)   47.6%
D)   54.6%
E)   61.0% F) All of the above
G) D) and E)

Question 7

A certain compound has a molar mass of 150 g/mol.Which is a possible empirical formula for this compound?

Accepted Answer

A)   CH2O
B)   CHO
C)   C2H2O2
D)   C2HO
E)   C2H2OF) C) and D)
G) All of the above

Question 8

PCl3 can be produced from the reaction of P4 with Cl2.
P4(s)+ 6 Cl2(g)$\to$ 4 PCl3(g)
If 1.00 g P4 reacts with 1.00 g Cl2,which reactant is the limiting reactant? What mass of product may be produced?

Accepted Answer

Chlorine is the limi...

Question 9

A 4.541 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 8.674 g CO2 and 5.328 g H2O.What is the empirical formula of the compound?

Accepted Answer

A)   CHO
B)   C2H6O
C)   C3H6O
D)   C3H4O
E)   C3H8O3F) B) and D)
G) C) and D)

Question 10

If 48.8 g of O2 is mixed with 48.8 g of H2 and the mixture is ignited,what is the maximum mass of water that may be produced?

Accepted Answer

A)   439 g
B)   54.9 g
C)   48.8 g
D)   98 g
E)   86.8 gF) None of the above
G) B) and D)

Question 11

What is the pH of 5.3  ×	imes× 10-3 M HCl(aq) ?

Accepted Answer

A)   -1.01
B)   2.28
C)   3.50
D)   1.01
E)   5.65 F) A) and D)
G) D) and E)

Question 12

What minimum mass of copper (II) nitrate must be added to 30.0 mL of a 0.0387 M phosphate solution in order to completely precipitate all of the phosphate as solid copper (II) phosphate?
2PO43-(aq) + 3Cu(NO3) 2(aq)  →	o→  Cu3(PO4) 2(s) + 6NO3-(aq)

Accepted Answer

A)   0.218 g
B)   0.653 g
C)   0.145 g
D)   0.0726 g
E)   0.327 g F) B) and C)
G) D) and E)

Question 13

A 1.185 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 2.264 g CO2 and 1.390 g H2O.What mass of oxygen is contained in the original sample?

Accepted Answer

A)   0.4117 g
B)   0.5673 g
C)   1.079 g
D)   0.8733 g
E)   0.2053 gF) D) and E)
G) A) and D)

Question 14

How many moles of sulfate ions are there in a 0.387-L solution of 0.927 M Al2(SO4) 3?

Accepted Answer

A)   0.359 mol
B)   1.08 mol
C)   1.25 mol
D)   0.120 mol
E)   7.19 molF) B) and E)
G) A) and B)

Question 15

A dilute solution is prepared by transferring 45.00 mL of a 0.5616 M stock solution to a 400.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution?

Accepted Answer

A)   0.06318 M
B)   0.1264 M
C)   0.04992 M
D)   0.01580 M
E)   0.2808 MF) B) and C)
G) All of the above

Question 16

Sulfur trioxide,SO3,is made from the oxidation of SO2as follows: 2SO2 + O2  →	o→  2SO3
A 21-g sample of SO2 gives 18 g of SO3.The   percent yield ‾\underline{	ext{  percent yield }} percent yield ​   of SO3 is .

Accepted Answer

A)   11 %
B)   69 %
C)   17 %
D)   26 %
E)   100 % F) D) and E)
G) All of the above

Question 17

The following equation: A = $\varepsilon$$\times$   
$\times$  C (where   
is path length and C is concentration)is known as the _____-Lambert law.

Accepted Answer

The answer of The following equation: A = $\varepsilon$$\times$ ...

Question 18

A 5.95-g sample of AgNO3 is reacted with excess BaCl2 according to the equation
2AgNO3(aq) + BaCl2(aq)  →	o→  2AgCl(s) + Ba(NO3) 2(aq) 
To give 3.75 g of AgCl.What is the percent yield of AgCl?

Accepted Answer

A)   49.8 %
B)   37.4 %
C)   74.7 %
D)   63.0 %
E)   100 % F) A) and C)
G) B) and E)

Question 19

A 1.850 g mixture of SrCO3 and SrO is heated.The SrCO3 decomposes to SrO and CO2.What was the mass percentage of SrCO3 in the mixture if the mass after heating is 1.445 g?

Accepted Answer

A)   26.6%
B)   21.9%
C)   13.7%
D)   73.4%
E)   78.1%F) A) and E)
G) B) and E)

Question 20

Calculate the number of moles of O2 required to react with phosphorus to produce 4.76 g of P4O6.
(Molar mass P4O6 = 219.9 g/mol)

Accepted Answer

A)   0.0216 mol
B)   0.149 mol
C)   0.0649 mol
D)   0.0433 mol
E)   0.130 molF) C) and D)
G) A) and C)

Exam 5: Stoichiometry: Quantitative Information About Chemical Reactions

PCl₃ can be produced from the reaction of P₄ with Cl₂. P₄(s)+ 6 Cl₂(g) $\to$ 4 PCl₃(g) If 1.00 g P₄ reacts with 1.00 g Cl₂,which reactant is the limiting reactant? What mass of product may be produced?

Correct Answer
verified
Chlorine is the limi...
View Answer

What is the pH of 5.3 $\times$ 10^-3 M HCl(aq) ?

Correct Answer
verified

What is the molarity of an NaI solution that contains 5.3 g of NaI in 41.0 mL of solution?

Correct Answer
verified

The empirical formula of ethylene is CH₂.An experimental determination of the molar mass of ethylene yields the value of 28 g/mol.What is the $\underline{\text{ molecular }}$ formula of ethylene?

Correct Answer
verified

A mass of 0.4113 g of an unknown acid,HA,is titrated with NaOH.If the acid reacts with 28.10 mL of 0.1055 M NaOH(aq) ,what is the molar mass of the acid?

Correct Answer
verified

How many moles of sulfate ions are there in a 0.387-L solution of 0.927 M Al₂(SO₄) ₃?

Correct Answer
verified

If the complete combustion of an unknown mass of ethylene produces 16.0 g CO₂,what mass of ethylene is combusted? C₂H₄(g) + 3 O₂(g) $\to$ 2 CO₂(g) + 2 H₂O(g)

Correct Answer
verified

A 5.95-g sample of AgNO₃ is reacted with excess BaCl₂ according to the equation 2AgNO₃(aq) + BaCl₂(aq) $\to$ 2AgCl(s) + Ba(NO₃) ₂(aq) To give 3.75 g of AgCl.What is the percent yield of AgCl?

Correct Answer
verified

A dilute solution is prepared by transferring 45.00 mL of a 0.5616 M stock solution to a 400.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution?

Correct Answer
verified

A 1.850 g mixture of SrCO₃ and SrO is heated.The SrCO₃ decomposes to SrO and CO₂.What was the mass percentage of SrCO₃ in the mixture if the mass after heating is 1.445 g?

Correct Answer
verified

Calculate the number of moles of O₂ required to react with phosphorus to produce 4.76 g of P₄O₆. (Molar mass P₄O₆ = 219.9 g/mol)

Correct Answer
verified

Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas.S₈(s) + 24 F₂(g) $\to$ 8 SF₆(g) What is the percent yield if 18.3 g SF₆ is isolated from the reaction of 10.0 g S₈ and 30.0 g F₂?

Correct Answer
verified

A 3.361 g sample of a hydrocarbon is burned in an excess of dioxygen,producing 6.295 g CO₂and 3.866 g H₂O.What is the empirical formula of the hydrocarbon?

Correct Answer
verified

A 4.541 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 8.674 g CO₂and 5.328 g H₂O.What is the empirical formula of the compound?

Correct Answer
verified

Sulfur trioxide,SO₃,is made from the oxidation of SO₂as follows: 2SO₂ + O₂ $\to$ 2SO₃ A 21-g sample of SO₂ gives 18 g of SO₃.The $\underline{\text{ percent yield }}$ of SO₃ is .

Correct Answer
verified

A certain compound has a molar mass of 150 g/mol.Which is a possible empirical formula for this compound?

Correct Answer
verified

Correct Answer
verified

A 1.185 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 2.264 g CO₂and 1.390 g H₂O.What mass of oxygen is contained in the original sample?

Correct Answer
verified

What minimum mass of copper (II) nitrate must be added to 30.0 mL of a 0.0387 M phosphate solution in order to completely precipitate all of the phosphate as solid copper (II) phosphate? 2PO₄^3-(aq) + 3Cu(NO₃) ₂(aq) $\to$ Cu₃(PO₄) ₂(s) + 6NO₃^-(aq)

Correct Answer
verified

If 48.8 g of O₂ is mixed with 48.8 g of H₂ and the mixture is ignited,what is the maximum mass of water that may be produced?

Correct Answer
verified

Exam 5: Stoichiometry: Quantitative Information About Chemical Reactions

PCl3 can be produced from the reaction of P4 with Cl2. P4(s)+ 6 Cl2(g) →\to→ 4 PCl3(g) If 1.00 g P4 reacts with 1.00 g Cl2,which reactant is the limiting reactant? What mass of product may be produced?

Correct AnswerverifiedChlorine is the limi...View AnswerShow Answer

What is the pH of 5.3 ×\times× 10-3 M HCl(aq) ?

Correct AnswerverifiedShow Answer

What is the molarity of an NaI solution that contains 5.3 g of NaI in 41.0 mL of solution?

Correct AnswerverifiedShow Answer

The empirical formula of ethylene is CH2.An experimental determination of the molar mass of ethylene yields the value of 28 g/mol.What is the molecular ‾\underline{\text{ molecular }} molecular ​ formula of ethylene?

Correct AnswerverifiedShow Answer

A mass of 0.4113 g of an unknown acid,HA,is titrated with NaOH.If the acid reacts with 28.10 mL of 0.1055 M NaOH(aq) ,what is the molar mass of the acid?

Correct AnswerverifiedShow Answer

How many moles of sulfate ions are there in a 0.387-L solution of 0.927 M Al2(SO4) 3?

Correct AnswerverifiedShow Answer

If the complete combustion of an unknown mass of ethylene produces 16.0 g CO2,what mass of ethylene is combusted? C2H4(g) + 3 O2(g) →\to→ 2 CO2(g) + 2 H2O(g)

Correct AnswerverifiedShow Answer

A 5.95-g sample of AgNO3 is reacted with excess BaCl2 according to the equation 2AgNO3(aq) + BaCl2(aq) →\to→ 2AgCl(s) + Ba(NO3) 2(aq) To give 3.75 g of AgCl.What is the percent yield of AgCl?

Correct AnswerverifiedShow Answer

A dilute solution is prepared by transferring 45.00 mL of a 0.5616 M stock solution to a 400.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution?

Correct AnswerverifiedShow Answer

A 1.850 g mixture of SrCO3 and SrO is heated.The SrCO3 decomposes to SrO and CO2.What was the mass percentage of SrCO3 in the mixture if the mass after heating is 1.445 g?

Correct AnswerverifiedShow Answer

Calculate the number of moles of O2 required to react with phosphorus to produce 4.76 g of P4O6. (Molar mass P4O6 = 219.9 g/mol)

Correct AnswerverifiedShow Answer

Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas.S8(s) + 24 F2(g) →\to→ 8 SF6(g) What is the percent yield if 18.3 g SF6 is isolated from the reaction of 10.0 g S8 and 30.0 g F2?

Correct AnswerverifiedShow Answer

A 3.361 g sample of a hydrocarbon is burned in an excess of dioxygen,producing 6.295 g CO2 and 3.866 g H2O.What is the empirical formula of the hydrocarbon?

Correct AnswerverifiedShow Answer

A 4.541 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 8.674 g CO2 and 5.328 g H2O.What is the empirical formula of the compound?

Correct AnswerverifiedShow Answer

Sulfur trioxide,SO3,is made from the oxidation of SO2as follows: 2SO2 + O2 →\to→ 2SO3 A 21-g sample of SO2 gives 18 g of SO3.The percent yield ‾\underline{\text{ percent yield }} percent yield ​ of SO3 is .

Correct AnswerverifiedShow Answer

A certain compound has a molar mass of 150 g/mol.Which is a possible empirical formula for this compound?

Correct AnswerverifiedShow Answer

The following equation: A = ε\varepsilonε×\times× ×\times× C (where is path length and C is concentration)is known as the _____-Lambert law.

Correct AnswerverifiedShow Answer

A 1.185 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 2.264 g CO2 and 1.390 g H2O.What mass of oxygen is contained in the original sample?

Correct AnswerverifiedShow Answer

What minimum mass of copper (II) nitrate must be added to 30.0 mL of a 0.0387 M phosphate solution in order to completely precipitate all of the phosphate as solid copper (II) phosphate? 2PO43-(aq) + 3Cu(NO3) 2(aq) →\to→ Cu3(PO4) 2(s) + 6NO3-(aq)

Correct AnswerverifiedShow Answer

If 48.8 g of O2 is mixed with 48.8 g of H2 and the mixture is ignited,what is the maximum mass of water that may be produced?

Correct AnswerverifiedShow Answer

PCl₃ can be produced from the reaction of P₄ with Cl₂. P₄(s)+ 6 Cl₂(g) $\to$ 4 PCl₃(g) If 1.00 g P₄ reacts with 1.00 g Cl₂,which reactant is the limiting reactant? What mass of product may be produced?

Correct Answer
verified
Chlorine is the limi...
View Answer

What is the pH of 5.3 $\times$ 10^-3 M HCl(aq) ?

Correct Answer
verified

Correct Answer
verified

The empirical formula of ethylene is CH₂.An experimental determination of the molar mass of ethylene yields the value of 28 g/mol.What is the $\underline{\text{ molecular }}$ formula of ethylene?

Correct Answer
verified

Correct Answer
verified

How many moles of sulfate ions are there in a 0.387-L solution of 0.927 M Al₂(SO₄) ₃?

Correct Answer
verified

If the complete combustion of an unknown mass of ethylene produces 16.0 g CO₂,what mass of ethylene is combusted? C₂H₄(g) + 3 O₂(g) $\to$ 2 CO₂(g) + 2 H₂O(g)

Correct Answer
verified

A 5.95-g sample of AgNO₃ is reacted with excess BaCl₂ according to the equation 2AgNO₃(aq) + BaCl₂(aq) $\to$ 2AgCl(s) + Ba(NO₃) ₂(aq) To give 3.75 g of AgCl.What is the percent yield of AgCl?

Correct Answer
verified

Correct Answer
verified

A 1.850 g mixture of SrCO₃ and SrO is heated.The SrCO₃ decomposes to SrO and CO₂.What was the mass percentage of SrCO₃ in the mixture if the mass after heating is 1.445 g?

Correct Answer
verified

Calculate the number of moles of O₂ required to react with phosphorus to produce 4.76 g of P₄O₆. (Molar mass P₄O₆ = 219.9 g/mol)

Correct Answer
verified

Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas.S₈(s) + 24 F₂(g) $\to$ 8 SF₆(g) What is the percent yield if 18.3 g SF₆ is isolated from the reaction of 10.0 g S₈ and 30.0 g F₂?

Correct Answer
verified

A 3.361 g sample of a hydrocarbon is burned in an excess of dioxygen,producing 6.295 g CO₂and 3.866 g H₂O.What is the empirical formula of the hydrocarbon?

Correct Answer
verified

A 4.541 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 8.674 g CO₂and 5.328 g H₂O.What is the empirical formula of the compound?

Correct Answer
verified

Sulfur trioxide,SO₃,is made from the oxidation of SO₂as follows: 2SO₂ + O₂ $\to$ 2SO₃ A 21-g sample of SO₂ gives 18 g of SO₃.The $\underline{\text{ percent yield }}$ of SO₃ is .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 1.185 g sample of a compound containing only carbon,hydrogen,and oxygen is burned in an excess of dioxygen,producing 2.264 g CO₂and 1.390 g H₂O.What mass of oxygen is contained in the original sample?

Correct Answer
verified

What minimum mass of copper (II) nitrate must be added to 30.0 mL of a 0.0387 M phosphate solution in order to completely precipitate all of the phosphate as solid copper (II) phosphate? 2PO₄^3-(aq) + 3Cu(NO₃) ₂(aq) $\to$ Cu₃(PO₄) ₂(s) + 6NO₃^-(aq)

Correct Answer
verified

If 48.8 g of O₂ is mixed with 48.8 g of H₂ and the mixture is ignited,what is the maximum mass of water that may be produced?

Correct Answer
verified