Gas volumes and molar volume Quiz
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5 questions, one answer each
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1. What volume does 0.0500 mol of any gas occupy at rtp?
- A. 0.480 dm³
- B. 1.20 dm³
- C. 0.0500 dm³
- D. 2.40 dm³
2. Which statement is Avogadro's law?
- A. Equal masses of gases occupy equal volumes
- B. One mole of any gas weighs 24 g
- C. Gas volume is inversely proportional to amount
- D. Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules
3. 30 cm³ of H₂ reacts with excess O₂ to form H₂O(l): 2H₂ + O₂ → 2H₂O. What volume of O₂ is used?
- A. 60 cm³
- B. 30 cm³
- C. 15 cm³
- D. 45 cm³
4. What volume of CO₂ at rtp forms when 5.00 g of CaCO₃ (M = 100.1 g mol⁻¹) reacts with excess acid?
- A. 1.20 dm³
- B. 2.40 dm³
- C. 0.600 dm³
- D. 0.120 dm³
5. 10 cm³ of ethane, C₂H₆, burns in 50 cm³ of oxygen: 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O(l). What is the total volume of gas after cooling?
- A. 20 cm³
- B. 35 cm³
- C. 30 cm³
- D. 40 cm³