What number of moles of oxygen would exert a pressure of 10 atm at 320
CHEMISTRY
WAEC 2022
What number of moles of oxygen would exert a pressure of 10 atm at 320 K in an 8.2 dm3 cylinder? [R=0.082 atm dm-3 mol-1 K-1]
- A. 0.32
- B. 1.52
- C. 3.13
- D. 31.25
Correct Answer: C. 3.13
Explanation
P = 10atm, T= 320K, V= 8.2dm3 PV =nRT n = P * V/R * T 10 * 8.2/0.082 * 320 = 82/26.24 n = 3.13
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