MCQ
One mole of oxygen gas at $\text{STP}$ is equal to $ .........$
- ✓$6.022 \times 10^{23}$ molecules of oxygen.
- B$6.022 \times 10^{23}$ atoms of oxygen.
- C$16g$ of oxygen.
- D$32g$ of oxygen.
✓
Answer
Correct option: A.
$6.022 \times 10^{23}$ molecules of oxygen.
$1$ mole of $\ce{O_2}$ gas at $\ce{STP = 6.022 \times 10^{23}}$ molecules of $\ce{O_2}\ ($Avogadro number$) = 32g$ of $\ce{O_2}$.
Hence, $1$ mole of oxygen gas is equal to molecular weight of oxygen as well as Avogadro number.
Hence, $1$ mole of oxygen gas is equal to molecular weight of oxygen as well as Avogadro number.
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