Gas volumes and the ideal gas equation Quiz
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5 questions, one answer each
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1. What volume of hydrogen at rtp is produced when 0.0500 mol of zinc reacts with excess acid, Zn + 2HCl → ZnCl2 + H2?
- A. 1.20 dm3
- B. 2.40 dm3
- C. 0.600 dm3
- D. 24.0 dm3
2. A 0.0200 mol sample of gas occupies 500 cm3 at 300 K. What is its pressure (R = 8.31 J K-1 mol-1)?
- A. 3.32 x 10^5 Pa
- B. 9.97 x 10^3 Pa
- C. 9.97 x 10^7 Pa
- D. 9.97 x 10^4 Pa
3. Which volume in m3 is equal to 250 cm3?
- A. 2.5 x 10^-1
- B. 2.5 x 10^-4
- C. 2.5 x 10^-3
- D. 2.5 x 10^2
4. A gas has pV = 8.31 x 10^2 J when n = 0.250 mol. What is its temperature in K?
- A. 100 K
- B. 1330 K
- C. 400 K
- D. 4.00 K
5. In Core Practical 1, what is the effect of a leak that lets some hydrogen escape?
- A. The molar volume is calculated too high
- B. There is no effect
- C. The molar volume is calculated too low
- D. The mass of magnesium is changed