Please answer all questions.

1			On a day when atmospheric pressure is 75.83 cmHg, a pressure gauge on a tank of gas reads a pressure of 258.5 cmHg. What is the absolute pressure (in atmospheres and kPa) of the gas in the tank?
			A)	334.3 cm Hg = 4.399 atm = 445.7 kPa
			B)	182.7 cmHg = 2.40 atm = 243.2 kPa
			C)	334.3 cmHg = 4.398 atm = 445.6 kPa
			D)	258.5 cmHg = 3.40 atm = 345 kPa
2			A certain mass of an ideal gas occupies a volume of 4.00 m3 at 758 mmHg. Compute its volume at 635 mmHg if the temperature remains unchanged.
			A)	3.55 m3
			B)	0.298 m3
			C)	1.19 m3
			D)	4.77 m3
3			A given mass of ideal gas occupies 38 mL at 20°C. If its pressure is held constant, what volume does it occupy at a temperature of 45°C?
			A)	86 mL
			B)	35 mL
			C)	17 mL
			D)	41 mL
4			A tank of ideal gas is sealed off at 20°C and 1.00 atm pressure. What will be the pressure (in kPa and mmHg) in the tank if the gas temperature is decreased to -35°C?
			A)	125 kPa = 9.35 x 102 mmHg
			B)	82 kPa = 1.08 mmHg
			C)	1.75 kPa = 13 mmHg
			D)	82 kPa = 6.2 x 102 mmHg
5			Given 1000mL of helium at 15°C and 763 mmHg, determine its volume at -6°C and 420 mmHg.
			A)	1.68 x 103 mL
			B)	7.27 x 102 mL
			C)	1.97 x 103 mL
			D)	5.08 x 102 mL
6			A 5000-cm3 tank contains an ideal gas (M=40 kg/kmol) at a gauge pressure of 530 kPa and a temperature of 25°C. Assuming atmospheric pressure to be 100 kPa, what mass of gas is in the tank?
			A)	0.051 kg
			B)	0.61 kg
			C)	51 kg
			D)	5.1 x 104 kg
7			An air bubble of volume V0 is released near the bottom of a lake at a depth of 11.0 m. What will be its new volume at the surface? Assume its temperature to be 4.0°C at the release point and 12°C at the surface. The water has a density of 1000 kg/m3, and atmospheric pressure is 75 cmHg.
			A)	1.1 Vo
			B)	2.1 Vo
			C)	2.0 Vo
			D)	6.2 Vo
8			Find the mass of a neon atom. The atomic mass of neon is 20.2 kg/kmol.
			A)	3.36 kg
			B)	3.36 x 10-23 kg
			C)	3.36 x 10-26 kg
			D)	2.98 x 10-27 kg
9			At what temperature will the molecules of an ideal gas have twice the rms speed they have at 20°C?
			A)	586 K = 313°C (approximately)
			B)	1172 K = 899°C (approximately)
			C)	414 K = 141°C (approximately)
			D)	73 K = -200°C (approximately)
10			An object must have a speed of at least 11.2 km/s to escape from the Earth's gravitational field. At what temperature will urms for H2 molecules equal the escape speed? Repeat for N2 molecules. (MH2=2.0 kg/kmol and MN2=28 kg/kmol.)
			A)	1.0 x 104 K; 1.4 x 105 K
			B)	5.0 x 103 K; 7.0 x 104 K
			C)	1.0 x 107 K; 1.4 x 108 K
			D)	3.0 x 104 K; 4.2 x 106 K