$100 \, mL$ of $O_2$ and $H_2$ are kept at the same temperature and pressure. Which of the following is true regarding the number of molecules?
- A$N_{O_2} > N_{H_2}$
- B$N_{O_2} < N_{H_2}$
- C$N_{O_2} = N_{H_2}$
- D$N_{O_2} + N_{H_2} = 0$
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