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Question
A sample of pure water, whatever the source always contains ______ by mass of oxygen and 11.1% by mass of hydrogen.
Options
88.9
18
80
16
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Solution
A sample of pure water, whatever the source always contains 88.9 by mass of oxygen and 11.1 % by mass of hydrogen.
Explanation:
H2O = 100%
H2 = 11.1%
O = ?
O = 100 − 11.1
O = 88.9
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