Compound A contains 8 . 7 % Hydrogen, 74 % Carbon and 17 . 3 % Nitrogen. The molecular formula of the compound is, Given : Atomic masses of C , H and N are 12 , 1 and 14 amu respectively. The molar ma

Question

Compound A contains 8 . 7 % Hydrogen, 74 % Carbon and 17 . 3 % Nitrogen. The molecular formula of the compound is, Given : Atomic masses of C , H and N are 12 , 1 and 14 amu respectively. The molar mass of the compound A is 162 g mol - 1 .

TestHub · Accepted Answer

C 74 % 74 12 = 6 . 16 6 . 16 1 . 23 = 5 N 17 . 3 % 17 . 3 14 = 1 . 23 1 . 23 1 . 23 = 1 H 8 . 7 % 8 . 7 1 = 8 . 7 8 . 7 1 . 23 = 7 Emperical formula = C 5 NH 7 Emperical weight = 81 Multiplying factor = 162 81 = 2 Molecular formula= Empirical formula n Molecular formula= C 5 NH 7 2 Molecular formula = C 10 N 2 H 14

$C$	$74 %$	$\frac{74}{12} = 6.16$	$\frac{6.16}{1.23} = 5$
$N$	$17.3 %$	$\frac{17.3}{14} = 1.23$	$\frac{1.23}{1.23} = 1$
$H$	$8.7 %$	$\frac{8.7}{1} = 8.7$	$\frac{8.7}{1.23} = 7$

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