Questions -

Q1. A pressure that will support a column of Hg to a height of 256 mm would support a column of water to what height? The density of mercury is 13.6 g/cm³.

a. 348 cm

b. 1.00 x 10² ft

c. 18.8 mm

d. 33.3 ft

e. 76.0 cm

Q2. A sample of nitrogen gas has a volume of 32.4 L at 20 degrees Celsius. The gas is heated to 220 degrees Celsius at constant pressure. What is the final volume of nitrogen?

a. 2.94 L

b. 19.3 L

c. 31.4 L

d. 54.5 L

e. 356 L

Q3. The gas pressure in an aerosol can is 1.8 atm at 25 degrees Celsius. If the gas is an ideal gas, what pressure would develop in the can if it were heated to 475 degrees Celsius?

a. 0.095 atm

b. 0.717 atm

c. 3.26 atm

d. 4.52 atm

e. 34.2 atm

Q4. If the pressure on a gas sample is triples and the absolute temperature is quadrupled, by what factor will the volume of the sample change?

a. 12

b. 3/4

c. 4/3

d. 1/3

e. 4

Q5. At what temperature will a fixed mass of gas with a volume of 125 L at 15 degrees Celsius and 750 mmHg occupy a volume of 101 L at a pressure of 645 mmHg?

a. -73 C

b. 10.4 C

c. 2 C

d. 34 C

e. 200 C

Q6. How many molecules of N2 gas can be present in a 2.5 L flask at 50 degrees Celsius and 650 mm Hg?

a. 2.1X10²³

b. 4.9×10²²

c. 3.1×10²³

d. 3.6×10²⁵

e. 0.081

Q7. 0.500 mole of ammonia (NH₃) occupies a 1.2 L flask at 150 degrees Celsius. Calculate the pressure of the ammonia inside the flask.

a. 6.91 × 10^-2 atm

b. 5.13 atm

c. 12.2 atm

d. 14.5 atm

e. 22.4 atm

Q8. Calculate the density of CO₂ at 100 degrees Celsius and 10.0 atm pressure.

a. 1.44 g/L

b. 134 g/L

c. 44.0 g/L

d. 53.6 g/L

e. 14.4 g/L

Q9. Calculate the density of Ar(g) at -11 degrees Celsius and 675 mm Hg.

a. 1.52 g/L

b. 1.65 g/L

c. -39.3 g/L

d. 39.95 g/L

e. 1254 g/L

Q10. Determine the molar mass of Freon -11 gas if a sample weighing 0.597 g occupies 100 cm³ at 95 degrees Celsius, and 1,000 mm Hg.

a. 0.19 g/mol

b. 35.3 g/mol

c. 70.9 g/mol

d. 137 g/mol

e. 384 g/mol