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Per NCERT, the MASS PER CENT of an element in a compound is calculated using which formula?
A(mass of that element in compound / molar mass of compound) × 100
B(molar mass / mass of element) × 100
C(boiling point / 100)
D(atomic number × 100)
Answer & Solution
Correct answer: A. (mass of that element in compound / molar mass of compound) × 100
Per NCERT §1.9, mass% = (mass of element / total molar mass) × 100. The other options misstate.
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