A 3.8 mL volume of gas contains 5.6 × 10²² gas particles. How many gas particles are there in 15 mL if the gas is at the same pressure and temperature?

Question

Quizplus · Accepted Answer

The number of gas particles is directly proportional to the volume if the pressure and temperature are constant. Therefore, you can set up a proportion: $ \frac{5.6 \times 10^{22}}{3.8} = \frac{x}{15} $. Solving for $x$ gives $x = 2.2 \times 10^{23}$, which corresponds to choice C.

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