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Passage :
"Molecular formula represents the actual number of atoms of different elements present in one molecule of the compound". ${Molecular formula = (Empirical formula)}_{n.}$ Where ‘n’ is a positive integer.
Q. The molecular weight of an organic compound is 180. Its empirical formula is ${CH}_{2} O$ . The molecular formula is

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$C_{7} H_{16} O_{5}$

$C_{8} H_{4} O_{5}$

$C_{5} H_{8} O_{7}$

$C_{6} H_{12} O_{6}$

answer is A.

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Detailed Solution

Among all the given choices, correct choice is A

Given data:-

Molecular weight of an organic compound is =180.

Its empirical formula is = ${CH}_{2} O$ .

We need to find the n, therefore n will be x.

EF wt =12+2+16=30

$n = \frac{M wt}{EF wt}$ = $\frac{180}{30}$ = 6

M F = n x EF, 6 X ( ${CH}_{2} O$ )

Therefore, The molecular formula is $C_{6} H_{12} O_{6}$ .

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