Question

How many moles of Oxygen molecules are their in 50.0dm3​

Answer 1

Answer:

At STP, 1 mol occupies 22.4 L. In 50.0 L, therefore, there are 50.0/22.4 = 2.23 mol O₂.

1 mol = 6.022 × 10²³ molecules. Multiply this by 2.23 to get 1.34 × 10²⁴ molecules.

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