Question

The emprical formula and molecular formula of a compound are CH2O and 180g/mole.what will be the molecular formula of the compound?

Answer 1

Given E.F of a compound = CH2O

Emperical weight of a compound = 12+2(1)+16 = 12+2+16 = 14+16 = 30
Emperical weight = 30 g/mol

Given molecular weight = 180 g/mol

Simplest ratio of molecular and emperical weights = 180/30 = 6
therefore molecular formula = 6(emperical formula)
                                             = 6(CH2O)
                                             = C6H12O6 which is a glucose molecule!!

Answer 2

$<b>Correct question</b>$ :-

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The Emprical formula and Molecular weight of a compound are CH2O and 180g/mole. what is Molecular formula?

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$<b>Given</b>$ :-

Empirical formula = $\sf\:CH_{2}O$

Molecular weight = 180

M.wt = n × E.F

$n \: \: = \: \: \frac{m.wt}{e.f.wt}$

$n \: \: = \: \: \frac{180}{30}$

$\boxed{n \: \: = \: \: 6}$

$<b>M.F = n × E.F</b>$

= 6 × $\sf\:CH_{2}O$

M.F = $\sf\:C_{6}H_{12}O_{6}$