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Teachoo Questions
Last updated at April 16, 2024 by Teachoo
Answer
B - 2g H 2
Explanation:
Number of moles = Given mass of substance / Molecular mass of substance
n = m / M
7g N 2 → 7 / 28 = 0.25 moles of molecules
2g H 2 → 2 / 2 = 1 mole of molecules
16g NO 2 → 16 / 46 = 0.347 moles of molecules
16g O 2 → 16 / 32 = 0.5 moles of molecules
Thus 2g H 2 has the most number of molecules.
