Gas Volumes Quiz
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5 questions, one answer each
Each answer is checked as you go, with why.
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1. What volume does one mole of any gas occupy at room temperature and pressure?
- A. 1 dm³
- B. 22.4 dm³
- C. 24 dm³
- D. 100 dm³
2. What is the correct equation for calculating the volume of a gas from its number of moles?
- A. V = n ÷ 24
- B. V = n × 24
- C. V = 24 ÷ n
- D. V = n × Mr
3. How many moles of gas are present in 4800 cm³ at RTP?
- A. 0.2 mol
- B. 2.0 mol
- C. 0.02 mol
- D. 20 mol
4. Why is it important to convert a gas volume from cm³ to dm³ before applying n = V ÷ 24?
- A. Because the equation only works in cm³
- B. Because 24 dm³ is the molar volume, so volumes must be in matching units
- C. Because cm³ cannot represent gas volumes
- D. Because dm³ measures mass, not volume
5. Calcium carbonate reacts with excess hydrochloric acid: CaCO3 + 2HCl → CaCl2 + H2O + CO2. What volume of CO2 is produced from 0.3 mol of CaCO3 at RTP?
- A. 3.6 dm³
- B. 7.2 dm³
- C. 0.3 dm³
- D. 14.4 dm³