Engineering Board Exam Reviewer · Chemistry · hard
What mass of oxygen gas is contained in a 10 L tank at 5 atm and 27 ° C? (R = 0.08206 L· atm/mol· K, O = 16)
- 2.03 g
- 65.0 g
- 722.1 g
- 32.5 g
Answer
B. 65.0 g
Solution
n = PV/RT = 5(10)/(0.08206 × 300) = 2.031 mol. m = 2.031(32) = 65.0 g.
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