How can the relationship between a gas at two sets of conditions be expressed mathematically by Boyle’ law?
Question 6 answers
A) V1T1 = V2T2
B) V1/T1 = V2/T2
C) P1/V1 = P2/V2
D) P1V1 = P2V2


Question 7 text   Question(7)
A mineshaft filled with air at 1.00 atm and 20.0°C is sealed to prevent the spread of a coal fire which will soon reach the bottom of the shaft. If the fire is expected to heat the air inside the shaft to 120°C, what will be the pressure inside the shaft, assuming that no air leaks out and that the volume of the shaft doesn't change?
Question 7 answers
A) 0.167 atm
B) 1.34 atm
C) 0.75 atm
D) 6.00 atm


Question 8 text   Question(8)
Assume 0.321 g zinc metal is allowed to react with excess hydrochloric acid (an aqueous solution of HCl gas) according to the equation Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g) . The resulting hydrogen gas is collected over water at 25°C, while the barometric pressure is 745.4 mmHg. What volume of hydrogen gas will be collected? (At 25°C, the vapor pressure of water is 23.8 mmHg.)
Question 8 answers
A) 0.122 liters
B) 0.063 liters
C) 0.126 liters
D) 4.10 liters


Question 9 text   Question(9)
What is the name given to the relationship that shows that an increase in pressure leads to a decrease in the volume of a gas?
Question 9 answers
A) Charles’s law
B) Boyle’s law
C) Avogadro’s number
D) Gay-Lussac’s law


Question 10 text   Question(10)
A sample of gas is collected by water displacement. The atmospheric pressure in the room is 757 mm Hg and the vapor pressure of water is 17 mm Hg. What is the partial pressure of hydrogen under these conditions?
Question 10 answers
A) 17 mm Hg
B) 740 mm Hg
C) 774 mm Hg
D) 757 mm Hg

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