Final answer:
To calculate the number of molecules, multiply the number of moles by Avogadro's number.
Step-by-step explanation:
The number of molecules in a given amount of substance can be calculated using Avogadro's number (6.022 × 10^23 molecules/mol) and the amount of substance in moles.
In this case, there are 0.053 moles of O₂. To find the number of molecules, you can multiply the number of moles by Avogadro's number:
Number of molecules = 0.053 moles × 6.022 × 10^23 molecules/mol
Calculating this will give you the answer.
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