Question

The Percentage composition of Oxygen in H2

(a) 88.89 %

O is _____

(b) 50%

(c) 40%

(d) 45 %

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Answer 1

Answer:

(a) 88.89%

Explanation:

The percentage of an element in a compound is 100 times the fraction, so for water the mass percent hydrogen is 11.11% and the mass percent oxygen is 88.89%.

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Answer 2

at the percentage composition of oxygen in H2O is 50%