MCAT Chemistry Question — Pressure
- Jan 17, 2017
- MCAT Question of the Day
The reaction is as follows:
2 NaNO3 + (NH4)2SO4 → Na2SO4 (aq) + 2 N2O (g)+ 4H2O (g) (230—300° С)
A. 0.5 atm
B. 0.6 atm
C. 0.9 atm
D. 1.8 atm
Click for Explanation
B. 0.6 atm, correct, 2 moles nitrous oxide and 4 moles of water vapor in the products indicate that 1/3 of the pressure is from the nitrous oxide
C. 0.9 atm, incorrect, this answer incorrectly shows that 1/2 the pressure is from nitrous oxide, but the correct ratio is determined by the molar ratio of gas products
D.1.8 atm, incorrect, this would indicate that all pressure is from the nitrous oxide
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