NEET Chemistry Percentage Composition MCQ Question
Calculate the percentage composition of sodium in sodium chloride (NaCl). (Atomic mass: Na = 23 u, Cl = 35.5 u)
39.34%
40.00%
60.66%
23.00%
Correct Answer
Detailed Explanation
The percentage composition of an element in a compound is calculated using the formula: (mass of the element in 1 mole of compound / molar mass of the compound) × 100. For NaCl, this is (23 / (23 + 35.5)) × 100 = 39.34%.
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