How many moles of O2 are there in 2500g of O2?

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Answer 1 · 2014-07-02T00:55:38

Mole is a number that connects mass of a substance with its number of particles.

1 mole of a substance = 6.02 x $10^{23}$ $10^23$ particles (entities)

1 mole of Dioxygen or $O_{2}$ $O_2$ = 6.02 x $10^{23}$ $10^23$ molecules of $O_{2}$ $O_2$

1 mole of $O_{2}$ $O_2$ has mass 32 g

we can say that

32 g of $O_{2}$ $O_2$ = 1 mole

1g of $O_{2}$ $O_2$ = 1/32 mole

2500 g of $O_{2}$ $O_2$ = 1/32 x 2500 = 78.125 moles.