The volume of a sample of a gas is 415 mL at 10.0 atm and 337 K. What volume will it occupy at 5.32 atm and 337 K?

1
The volume of a sample of a gas is 415 mL at 10.0
atm and 337 K. What volume will it occupy at 5.32
atm and 337 K?

1. 14.4 mL
2. 156 mL
3. 144 mL
4. 865 mL
5. 780 mL

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2
The Rankine temperature scale is an absolute
temperature scale based on the Fahrenheit degree
rather than the Celsius degree. What number
(nearest whole number) goes into the blank in the
formula below that allows one to convert directly
from degrees Fahrenheit to degrees Rankine? R
F (______)

1. 273
2. -273
3. 470
4. 460
5. - 460

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3
Choose the response that includes all of the
following statements that are correct, and no
incorrect statements. Assume constant pressure in
each case. If a sample of gas is I. heated from
100C to 200C the volume will double. II.
heated from 0C to 273C the volume will double.
III. cooled from 400C to 200C the volume will
decrease by a factor of two. IV. cooled from
1000C to 200C the volume will decrease by a
factor of five. V. heated from 200C to 2000C
the volume will increase by a factor of ten.

1. II
2. I and II
3. III and IV
4. II and III
5. none of these

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4
The volume of a sample of a gas is 405 mL at 10.0
atm and 467 K. What volume will the sample occupy
at 10.0 atm and 1025 K?

1. 644 mL
2. 889 mL
3. 405 mL
4. 434 mL
5. 185 mL

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5
A gas sample has a volume of 6.30 L at STP. What
would be its pressure if it occupied 5.70 L at
0.0C?

1. 688 torr
2. 7.13 torr
3. 840. torr
4. 1.51 atm
5. 0.475 torr

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6
Which possible response includes all the
following statements that are correct, and no
incorrect statements? I. For a sample of gas
held at constant pressure, a plot of volume
versus temperature is a straight line. II. For a
sample of gas held at constant pressure, a plot
of volume versus temperature is one branch of a
hyperbola. III. For a sample of gas held at
constant temperature, a plot of volume versus
pressure is a straight line. IV. For a sample of
gas held at constant temperature, a plot of
volume versus pressure is one branch of a
hyperbola. V. At constant pressure the volume
occupied by a definite mass of a gas varies
inversely with the absolute temperature. VI. At
constant pressure the volume occupied by a
definite mass of a gas varies directly with the
absolute temperature. VII. At constant
temperature the volume occupied by a definite
mass of a gas varies inversely with the applied
pressure. VIII. At constant temperature the
volume occupied by a definite mass of a gas
varies directly with the applied pressure.

1. I, III, V, and VII
2. II, IV, VI, and VIII
3. I, IV, VI, and VII
4. II, III, V, and VIII
5. none of these

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7
A sample of gas has a volume of 180. mL at -30.C
and 1.05 atm. What will be its volume at 35C and
0.525 atm?

1. 52 mL
2. 280. mL
3. 456 mL
4. 42 mL
5. 114 mL

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8
If 1.00 L of a gas is 4.40 times as heavy as 1.00
L of O2 at the same temperature and pressure,
then the molecular weight of the gaseous
substance is _______.

1. 50.0 amu
2. 67.0 amu
3. 70.4 amu
4. 88.0 amu
5. 141 amu

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9
What is the volume occupied by 3.50 grams of Cl2
gas at 45C and 745 torr?

1. 1.17 L
2. 0.961 L
3. 1.05 L
4. 1.46 L
5. none of these

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10
How many moles of an ideal gas are contained in
8.21 L at 73C and 380 torr?

1. 0.250
2. 1.5 x 1023
3. 0.144
4. 7.5 x 1023
5. 4.2 x 10-25

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11
A gaseous compound is 23.79 C, 5.99 H and
70.22 Cl by mass. At STP 258 mL of the gas
weighs 0.581 g. What is the molecular formula for
this compound?

1. CH3Cl2
2. CH3Cl
3. CH2Cl2
4. C2HCl
5. C2H7Cl2

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12
What is the pressure exerted by 26.0 g SO2, 4.0 g
H2, and 20.2 g Ne in a 10.0-liter container at
50.0C?

1. 9.04 atm
2. 10.1 atm
3. 14.4 atm
4. 18.6 atm
5. 26.3 atm

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13
A mixture of 16.0 g of O2, 21.0 g of N2, and 16.0
g of He at 20.C is in a 25.0-L container. What
are the partial pressures of O2, N2, and He in
this mixture? O2 / N2 / He

1. 0.481 atm / 1.44 atm / 3.85 atm
2. 0.481 atm / 0.721 atm / 3.85 atm
3. 0.962 atm / 1.44 atm / 3.85 atm
4. 0.481 atm / 0.721 atm / 0.240 atm
5. 0.962 atm / 0.721 atm / 0.240 atm

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14
What volume of H2 at STP would be required to
react completely with 12.4 grams of Fe3O4
according to the equation below? Fe3O4(s)
4H2(g) image 3Fe(s) 4H2O(g)

1. 4.80 L
2. 16.7 L
3. 32.0 L
4. 20.4 L
5. 1.20 L

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15
A 0.720-gram sample, known to contain only CaCO3
and BaCO3, was heated until the carbonates were
decomposed to oxides as indicated. After heating,
the mass of the solid residue was 0.516 gram.
What mass of BaCO3 was present in the sample?
CaCO3(s) image CaO(s) CO2(g) BaCO3(s) image
BaO(s) CO2(g)

1. 0.316 g
2. 0.384 g
3. 0.516 g
4. 0.463 g
5. 0.521 g

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16
Which response includes all the following
statements that describe correctly the properties
of gases, and no others? I. At constant
temperature, the pressure increases as the volume
of a definite mass of a gas increases. II. At
constant pressure, the volume of a definite mass
of a gas increases as the temperature increases.
III. At reasonable temperatures and pressures,
gases consist mostly of empty space. IV. Heating
a sample of gas forces the particles closer
together when the pressure and volume remain
constant. V. The forces of attraction between
individual gaseous particles are relatively weak.

1. II, III, and V
2. I, II, and V
3. III and V
4. II, IV, and V
5. I, III, and V

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17
Calculate the ratio of the rate of effusion of
CO2 to He.

1. 0.090/1
2. 0.30/1
3. 3.3/1
4. 11/1
5. 12/1

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18
A gas of unknown composition effuses at the rate
of 10 mL/s in an effusion apparatus in which CH4
gas effuses at the rate of 20 mL/s. What is the
approximate molecular weight of the unknown gas?

1. 4 amu
2. 8 amu
3. 16 amu
4. 32 amu
5. 64 amu

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19
Which one of the responses includes all of the
following statements that are correct, and no
incorrect statements? I. At a given temperature
and pressure, say 500C and 1 atmosphere, the
attractive forces between water molecules are
greater than the attractive forces between
ammonia molecules. II. At 500C and 1 atmosphere
pressure, the attractive forces between ammonia
molecules are greater than those between water
molecules. III. By elastic collisions between
molecules of a gas, we refer to collisions in
which there is no net gain or loss of energy. IV.
If the pressure on a sample of an ideal gas is
doubled while the absolute temperature is
doubled, the final volume will be unchanged. V.
If the pressure on a sample of an ideal gas is
halved while the absolute temperature is halved,
the final volume will be unchanged.

1. I, II, and III
2. III, IV, and V
3. I, III, IV, and V
4. I, IV, and V
5. II and IV

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