How many moles of O2 in 40.0 grams of oxygen gas?

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Answer 1 · 2018-01-19T04:39:09

$1.25$ $1.25$ moles of $O_{2}$ $O_2$

First, we need to calculate the molar mass of oxygen gas.

Oxygen gas is $O_{2}$ $O_2$ .

$O_{2}$ $O_2$ has a molar mass of $32 g / m o l$ $32g"/"mol$ .

$:."Moles"_(O_2)=(40g)/(32g"/"mol)$

$:."Moles"_(O_2)=(40cancelg)/(32cancelg"/"mol)$

$"Moles"_(O_2)=1.25mol$

$:.$ There are $1.25$ moles of $O_2$ in $40g$ of oxygen gas.

Answer 2 · 2018-01-19T04:40:58

1.25

Molar mass of oxygen gas ( $O_2$ ) = 32gm

So,

no of moles $= 40/32$

no of moles $= 1.25$