What is the mass of 0.35 moles of oxygen gas molecules?

1 Answer
ChemStudent · Stefan V.
Jan 20, 2018

The answer is: #"11 g"#.

Explanation:

#n = m/M#

Where #n# = number of moles, #m# = mass in grams and #M# = molar mass.

We know the molar mass of #O_2# is 32.00 g/mol
i.e. 2 #xx# 16 g, the molar mass of one oxygen atom (#O#)

We can rearrange the formula to:
#m = nM#

#"mass" = "0.35 mol" xx "32.00 g/mol" = "11 g" -># two sig figs

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