3 years ago

PLEASE HELP ME ASAP!! How many molecules are in 7.5 grams of Oxygen gas?

1 answer:

4 0

It is about 6 x 10^23. So in 5 moles of oxygen gas, which has a mass of 5x16=80 grams, there are 5x6x10^23 = 30x10^23 molecules.

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