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Why is 17.031 g of ammonia not exactly 14 g N plus 3 g H?
AAvogadro number varies
BNatural N and H have isotopes
CAmmonia loses mass on mixing
DAtoms get heavier in compounds
Answer & Solution
Correct answer: B. Natural N and H have isotopes
Natural nitrogen includes some nitrogen-15 and hydrogen includes deuterium, so molar masses are not whole numbers.
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