Class 11 Chemistry Some Basic Concepts of Chemistry Percentage composition and Molecular formula

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What is the percentage by mass of oxygen in $NaOH$? (Atomic mass of $Na=23 \ u, O=16 \ u, H=1 \ u$)

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A
$16$
B
$20$
C
$40$
D
$60$

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Some Basic Concepts of Chemistry

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Percentage composition and Molecular formula

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