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The largest number of molecules is in

$(a)\;\text{36 g of water} \\ (b)\;\text{28 g of carbon monoxide} \\(c)\; \text{46 g of ethyl alcohol} \\(d)\;\text{54 g of nitrogen pentoxide }$
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Number of moles
$\large\frac{36}{18}$ of $H_2O$; $\large\frac{28}{28}$ of $CO$
$\large\frac{46}{46}$ of $C_2H_5OH$; and $\large\frac{54}{108}$ of $N_2O_5$
$ 2$ moles of $H_2O,1$ mole of $CO,1$ mole of $C_2H_5OH$ and $0.5$ mole of $ N_2O_5$
Large number of molecules is in 36 g of water.
Hence a is the correct answer.
answered Mar 21, 2014 by meena.p

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