Gas Law Multiple Choice Questions

1. On analysis, a compound with molar mass 60 g mol–1 was found to contain 12 g of carbon, 2 g of hydrogen, and 16 g of oxygen. What is the molecular formula of the compound?
A. CH2O
B. CH4O
C. C2H4O
D. C2H4O2

2. What is the total number of atoms in 0.20 mol of propanone, CH3COCH3?
a. 1.2×1022
b. 6.0×102
C. 1.2×1024
D. 6.0×1024

Assuming complete reaction, what volume of 0.200 mol dm–3 potassium hydroxide solution (KOH(aq)), is required to neutralize 25.0 cm3 of 0.200 mol dm–3 aqueous sulfuric acid, (H2SO4(aq))?
A. 12.5 cm3
B. 25.0 cm3
C. 50.0 cm3
D. 75.0 cm3

4. The temperature in Kelvin of 1.0 dm3 of an ideal gas is doubled and its pressure is tripled. What is the final volume of the gas in dm3?
A.
B.
C.
D.

5. What volume of 0.500 mol dm–3 sulfuric acid solution is required to react completely with 10.0 g of calcium carbonate according to the equation below? CaCO3(s) + H2SO4(aq)  CaSO4(aq) + H2O(l) + CO2(g)
A. 100 cm3
B. 200 cm3
C. 300 cm3
D. 400 cm3

6. What volume, in cm3, of 0.200 mol dm–3 HCl(aq) is required to neutralize 25.0 cm3 of 0.200 mol dm–3 Ba(OH)2(aq)?
A. 12.5
B. 25.0
C. 50.0
D. 75.0

7. A 4 g sample of sodium hydroxide, NaOH, is dissolved in water and made up to 500 cm3 of aqueous solution. What is the concentration of the resulting solution?
A. 0.1 mol dm–3
B. 0.2 mol dm–3
C. 0.5 mol dm–3
D. 1.0 mol dm–3

8. A hydrocarbon contains 90% by mass of carbon. What is its empirical formula?
A. CH2
B. C3H4
C. C7H10
D. C9H10

9. What amount of NaCl (in moles) is required to prepare 250 cm3 of a 0.200 mol dm–3 solution?
A. 50.0
B. 1.25
C. 0.800
D. 0.0500

10. Assuming complete reaction, what volume of 0.200 mol dm–3 HCl(aq) is required to neutralize 25.0 cm3 of 0.200 mol dm–3 Ba(OH)2(aq)?
A. 12.5 cm3
B. 25.0 cm3
C. 50.0 cm3
D. 75.0 cm3

11. What volume of 0.500 mol dm–3 HCl(aq) is required to react completely with 10.0 g of calcium carbonate according to the equation below?
CaCO3(s) +