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| 1 |
The pressure of a car tire is 310 kPa. If the pressure reading was made at 25oC, the reading of the tire pressure at -30oC would be |
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2.6 x 102 kPa |
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3.9 x 10-3 kPa |
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2.7 x 10-3 kPa |
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3.7 x 102 kPa |
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| 2 |
Under the same conditions of temperature and pressure, equal volumes of nitrogen gas and helium gas contain equivalent |
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moles |
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bonding forces |
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masses |
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atoms |
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| 3 |
Real gases behave most like ideal gases when |
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the pressure is high and the temperature is low |
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the pressure is low and the temperature is high |
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the pressure is low and the temperature is low |
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the pressure is high and temperature is high |
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| 4 |
At a constant pressure, 20 L of a gas at 400 K are expanded to 30 L. The final temperature of the gas must be |
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267 K |
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390 K |
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600 K |
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4000 K |
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| 5 |
A a quantity of gas collected at 298 K and 101 kPa occupies a volume of 200 mL. If the pressure on the gas is doubled and its temperature is raised to 596 K, the volume occupied by the gas will be |
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50.0 mL |
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100 mL |
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200 mL |
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800 mL |
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| 6 |
At a constant temperature, 600 mL of an ideal gas is at a pressure of 101 kPa. If the volume is decreased to 300 mL the pressure of the gas will be: |
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25.3 kPa |
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50.5 kPa |
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101 kPa |
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202 kPa |
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| 7 |
The mass of a fixed quantity of a gas |
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increases when the volume increases, at constant temperature |
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decreases when the absolute temperature decreases, at constant pressure |
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does not change at any temperature and pressure |
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decreases as the density increases |
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| 8 |
Which two of the following statements are correct?
1) The volume of a given mass of gas varies directly as its absolute temperature when the pressure remains constant.
2) When a gas is cooled, its molecules move faster
3) At constant volume, a decrease in pressure may be due to an increase in the number of molecules.
4) The molecules of a gas are in continuous motion. |
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1 and 3 |
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2 and 3 |
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1 and 4 |
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2 and 4 |
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| 9 |
At a constant pressure, 10.0 L of a gas are cooled from 546 K to 273 K. The final volume will be |
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5.00 L |
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2.00 L |
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8.00 L |
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20.0 L |
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| 10 |
The volume of one mole of an ideal gas, at 202 kPa and 273 K, is |
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5.60 L |
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11.2 L |
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22.4 L |
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44.8 L |
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| 11 |
One litre of an ideal gas at S.T.P. has a mass of 1.25 g. The molar mass of the gas is |
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0.626 g |
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1.25 g |
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22.4 g |
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28.0 g |
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| 12 |
What mass of water, H2O, would be needed to produce 112 L of Hydrogen, H2(g), at STP, according to the following equation?
2H2O(l) ------> 2H2(g) + O2(g) |
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36.0 g |
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45.0 g |
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90.0 g |
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112 g |
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| 13 |
What will be the total volume of products formed (measured at STP) when 19 g of CS2 (carbon disulfide) are burned according to the following equation?
CS2(l) + 3O2(g) ----> CO2(g) + 2SO3(g) |
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5.6 L |
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16.8 L |
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11.2 L |
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29.9 L |
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| 14 |
How many moles of carbon dioxide are produced when 1.0 mole of propanol (C3H7OH) burns completely in oxygen? Assume that CO2(g) and H2O(g) are the only products. |
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1.0 |
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2.0 |
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3.0 |
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4.0 |
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| 15 |
A gas is most soluble in water at |
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low pressure and low temperature |
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high pressure and high temperature |
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low pressure and high temperature |
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high pressure and low temperature |
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