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(a) Define atomic mass unit. (b) Disti...

(a) Define atomic mass unit.
(b) Distinguish between molecular mass and molar mass.

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(a) For answer, consult section 3.5.
(b) Molecular mass of a substance expressed in grams is known as its molar mass. This means that molecular mass is expressed in units 'u' while molar mass is expressed in units grams.
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