67. The hydrogen gas formed in a chemical reaction is collected over water at 30.0 °C at a total pressure of 732 mmHg. What is the partial pressure of the hydrogen gas collected in this way? If the total volume of gas collected is 722 mL, what mass of hydro- gen gas is collected? 6 6: 10atch KCY 6.6, IWE 6.11

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Chapter8: Properties Of Gases
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256
CHAPTER 6 Gases
77
67. The hydrogen gas formed in a chemical reaction is collected
over water at 30.0 °C at a total pressure of 732 mmHg. What is
the partial pressure of the hydrogen gas collected in this way? If
the total volume of gas collected is 722 mL, what mass of hydro-
gen gas is collected?
MISSED THIS? Read Section 6.6; Watch KCV 6.6, IWE 6.11
68. The air in a bicycle tire is bubbled through water and collected
at 25 °C. If the total volume of gas collected is 5.45 L at a tem-
perature of 25 °C and a pressure of 745 torr, how many moles of
gas were in the bicycle tire?
78
69. The zinc in a copper-plated penny will dissolve in hydrochloric
acid if the copper coating is filed down in several spots (so that the
hydrochloric acid can get to the zinc). The reaction between the
acid and the zinc is 2 H*(aq) + Zn(s)
When the zinc in a certain penny dissolves, the total volume of
gas collected over water at 25 °C is 0.951 L at a total pressure of
H2(8) + Zn² * (aq).
748 mmHg. What mass of hydrogen gas is collected?
MISSED THIS? Read Section 6.6; Watch KCV 6.6, IWE 6.11
70. A heliox deep-sea diving mixture contains 2.0 g of oxygen to
every 98.0 g of helium. What is the partial pressure of oxygen
when this mixture is delivered at a total pressure of 8.5 atm?
Reaction Stoichiometry Involving Gases
71. Consider the chemical reaction:
C(s) + H2O(8) –
CO(8) + H2(8)
How
liters of hydrogen gas are formed from the complete
many
reaction of 15.7 g C? Assume that the hydrogen gas is collected
at a pressure of 1.0 atm and a temperature of 355 K.
MISSED THIS? Read Section 6.7; Watch IWE 6.12
72. Consider the chemical reaction:
Transcribed Image Text:256 CHAPTER 6 Gases 77 67. The hydrogen gas formed in a chemical reaction is collected over water at 30.0 °C at a total pressure of 732 mmHg. What is the partial pressure of the hydrogen gas collected in this way? If the total volume of gas collected is 722 mL, what mass of hydro- gen gas is collected? MISSED THIS? Read Section 6.6; Watch KCV 6.6, IWE 6.11 68. The air in a bicycle tire is bubbled through water and collected at 25 °C. If the total volume of gas collected is 5.45 L at a tem- perature of 25 °C and a pressure of 745 torr, how many moles of gas were in the bicycle tire? 78 69. The zinc in a copper-plated penny will dissolve in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can get to the zinc). The reaction between the acid and the zinc is 2 H*(aq) + Zn(s) When the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °C is 0.951 L at a total pressure of H2(8) + Zn² * (aq). 748 mmHg. What mass of hydrogen gas is collected? MISSED THIS? Read Section 6.6; Watch KCV 6.6, IWE 6.11 70. A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 8.5 atm? Reaction Stoichiometry Involving Gases 71. Consider the chemical reaction: C(s) + H2O(8) – CO(8) + H2(8) How liters of hydrogen gas are formed from the complete many reaction of 15.7 g C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and a temperature of 355 K. MISSED THIS? Read Section 6.7; Watch IWE 6.12 72. Consider the chemical reaction:
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