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Stoichiometric Calculations

0.2 mole of a...

Question

0.2 mole of a saturated hydrocarbon x on complete combustion produce 26.4 gram of $C O_{2}$ . The molecular weight of x is

A

34

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B

64

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C

38

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D

44

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Solution

The correct option is C 34
$\begin{matrix} X + O_{2} \to H_{2} O + C o_{2} m a s s o f C i n 26.4 g o f C o_{2} = 26.4 \times \frac{12}{44} = 7.2 g c . 2 m o l e s o f x = 0.6 m o l e s o f C . W e g e t . X = C_{3} H_{8} (p r o p e r) H e n c e, = 44 g m (m o l e c u l a r) \end{matrix}$

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