What is the percent by mass of chlorine in NaCl ? Use percent Element is equal to total mass of element in compound over molar mass of compound times 100

NaCl contains one chlorine atom, with a mass of about 35.45 g per mole. The molar mass of NaCl is 22.99 + 35.45 = 58.44 g/mol, so chlorine’s mass percent is (35.45 ÷ 58.44) × 100 ≈ 60.66%, which is choice A.

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