The mass of water is 18.00 grams per mole. What is the % of oxygen in water?

1 Answer
anor277
May 26, 2018

#"%O"_"by mass"=89%#

Explanation:

We want the #"mass of oxygen"/"mass of water"xx100%#...and for a molar quantity of water this is...

#(16.00*g*mol^-1)/(18.00*g*mol^-1)xx100%=88.9%#..

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