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

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

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Answer 1 · 2018-05-26T13:59:34

${%O}_{by mass} = 89 %$ $"%O"_"by mass"=89%$

Explanation:

We want the $\frac{mass of oxygen}{mass of water} \times 100 %$ $"mass of oxygen"/"mass of water"xx100%$ ...and for a molar quantity of water this is...

$\frac{16.00 \cdot g \cdot m o l^{- 1}}{18.00 \cdot g \cdot m o l^{- 1}} \times 100 % = 88.9 %$ $(16.00*g*mol^-1)/(18.00*g*mol^-1)xx100%=88.9%$ ..

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

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