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(a) Calculate the gram molecular mass of...

(a) Calculate the gram molecular mass of sugar having molecular formula `C_(12)H_(22)O_(11)`
(b) Calculate
(i) the mass of 0.5 gram molecule of sugar and
(ii) Gram molecule of sugar in 547.2 gram.

Text Solution

Verified by Experts

(a) Molecular mass of sugar- `(C_(12)H_(22)O_(11))`
= 12 x at. mass of `C + 22 xx` at. mass of `H + 11 xx` at. mass of O
`= 12 xx 12 + 22 xx 1 + 11 xx 16 = 342`
Gram molecular mass of sugar = 342 g
(b) (i) 1 gram molecule of sugar = 342 g
0.5 gram molecule of sugar =`342 xx 0.5 = 171g`
(ii) 342 g of sugar = 1 gram molecule
547.2 g of sugar = `1/342 xx 547.2`
=1.6 gram molecule.
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