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What is the percentage by mass of H in  

What is the percentage by mass of H in  CH3COOH

A.

1.7%

B.

5.0%

C.

6.7%

D.

7.1%

View answer & explanation

Correct answer is C

- molecular mass (or molar mass) is 60.05 g/mol

- with 4 atoms of hydrogen present

( 4 / 60 ) X 100

≈6.7%

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