At STP, a 2.0-liter sample of nitrogen gas and a 2.0-liter sample of oxygen gas have equal
- Mayya Alocci
- Sep 12, 2024
- 1 min read
Regents Chemistry Exam June 2024 Question 22
22 At STP, a 2.0-liter sample of nitrogen gas and a 2.0-liter sample of oxygen gas have equal
(1) atomic masses (3) densities
(2) numbers of molecules (4) boiling points
Solution:
STP stands for standard temperature and pressure. Since both gases are at STP, they both have the same temperature, presure. They also have the same volume of 2 liters. According to the ideal gas law, PV=nRT, if two gases have the same temperature, pressure and volume, they will have the same number of moles, which means they will have the same number of molecules. Choice 2 is the correct answer choice.
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