Review For Test

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Review for Chapter Test 14 1.

Arrange the following gaseous elements or compounds in order of increasing rates of diffusion at the same temperature. a. Argon b. Carbon monoxide c. Chlorine dioxide d. Neon

2. Make the following conversions a. 1100 torr to atm

b. 3.78 kPa to atm

c. 375 mmHg to torr

3. A certain gas effuses four times as fast as oxygen (O2). What is the molar mass of the gas? Page | 1

4. A 3.50 L gas sample at 20 °C and a pressure of 86.7 kPa expands to a volume of 8.00 L. The final pressure of the gas is 56.7 kPa. What is the final temperature of the gas, in degrees Celcius?

5. A 48.0 g quantity of O2 in a balloon has volume of 30.0 L. What is the volume if 48.0 g of SO2 is substituted for O2 in the same balloon?

6. A sample of H2is collected in a bottle over water. The volume of the sample is 185 mL at a temperature of 25 °C. The pressure of H2in the bottle is 736 Torr. What is the mass of H2 in the bottle?

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7. What are the conditions for STP?

8. Natural gas (CH4) burns according to the equation CH4(g) + 2O2(g)  CO2(g) + 2H2O(l) What volume of CO2 measured at 27 °C and 1.50 atm is produced from 27.5 L of O2 measured at -23 °C and 825 Torr?

9. Hydrogen gas is produced when zinc reacts with sulfuric acid Zn(s) + H2SO4(aq)  ZnSO4(aq) + H2(g) a. If 159 mL of H2is collected over water at 24 °C and a barometric pressure of 738 torr, how many grams of Zn have been collected? The vapor pressure of water at 24 °C is 22.38 torr.

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