__PRACTICE
MULTIPLE CHOICE QUESTIONS FROM UNIT 10__

1.) A cylinder is filled
with 2.00 moles of nitrogen, 3.00 moles of argon, and 5.00 moles of
helium. If

the gas mixture is at STP, what is the partial
pressure of the argon?

(A) 152 torr (B) 228 torr
(C) 380. torr
(D) 760. torr

2.) Compared to the
average kinetic energy of 1 mole of water at 0 ^{o}C,
the average kinetic energy

of 1 mole of water at 298 K is

(A) the same, and the number of
molecules is the same

(B) the same, but the number of
molecules is greater

(C) greater, and the number of
molecules is greater

(D)
greater, but the number of molecules is the same

3.) If the pressure on a
given mass of gas in a closed system is increased and the temperature

remains constant, the volume of the gas will

(A)
decrease (B)
increase (C) remain the same

4.) Which gas has
approximately the same density as C_{2}H_{6} at STP?

(A)
NO (B) NH_{3}
(C) H_{2}S (D) SO_{2}

5.) At a temperature of
273 K, a 400. milliliter gas sample has a pressure of
760. millimeters of

mercury. If the pressure is
changed to 380. millimeters of mercury, at
which temperature will

this gas sample have a volume of 551 milliliters?

(A) 100
K (B)
188 K (C) 273
K (D) 546 K

6.)

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