(a) What is the mass of one molecule of $H_{2} {S O}_{4}$ ? (b) What is the molecular mass of $H_{2} {S O}_{4}$ ? (c) What is the gram molecular mass of $H_{2} {S O}_{4}$ ?

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Solution

(a) Mass of one molecule of $H_{2} S O_{4}$ = $\frac{M a s s o f o n e m o l e o f H_{2} S O_{4}}{6.022 \times 10^{23}}$
= $\frac{98 a m u}{6.022 \times 10^{23}}$
= $1.6 \times 10^{- 22} a m u$
(b) Molecular mass of $H_{2} S O_{4}$ = Mass of one mole of $H_{2} S O_{4}$
= $98 a m u$
(c) Gram molecular mass of $H_{2} S O_{4}$ = Mass of one mole of $H_{2} S O_{4}$ in grams
= $98$ grams

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