How many molecules of oxygen gas (02) are in 8.00 grams of
oxygen?

1.51×10²³

Explanation:

Convert to moles first

moles=mass/molar mass

moles=8.00/32      (molar mass of oxygen is multiplied by 2 since it is diatomic)

moles=1/4

multiply moles with Avogadro's constant

1/4*6.02×10²³

1.505×10²³

1.51×10²³ molecules of O₂ are in 8.00 grams of Oxygen.

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