If 2.38 mol of a gas has a volume of 120.0 mL, what is the volume of 1.97 mol of the gas at the same temperature and pressure?
A) 25.6 mL
B) 99.3 mL
C) 119 mL
D) 145 mL
E) 563 mL

Question

Quizplus · Accepted Answer

According to Avogadro's Law, equal volumes of gases at the same temperature and pressure contain equal number of moles. Therefore, the ratio of moles to volume is constant. Using this ratio, we can set up the following equation:
2.38 mol / 120.0 mL = 1.97 mol / x
Solving for x gives us the volume of the gas at 1.97 mol:
x = (1.97 mol * 120.0 mL) / 2.38 mol = 99.3 mL
Therefore, the answer is B.

If 238 Mol of a Gas Has a Volume of 120