Question

Largest number of molecules are present in:

• A. $44gm$ of carbon dioxide
• B. $28gm$ of carbon monoxide
• C. $36gm$ of water
• D. $64gm$ of sulphur dioxide

Answer 1

The correct option is C $36gm$ of water

A. $44g$ of $C{O}_2$

$N_A$ molecules are present in $1$ mole of $C{O}_2$ i.e $44g$

So, $44grams$ of $C{O}_2$ has $6.02\times {10}^{23}$ molecules.

B. $28g$ of $CO$

$N_A$ molecules are present in $1$ mole of $CO$ i.e $28g$

So, $28grams$ of $CO$ has $6.02\times {10}^{23}$ molecules.

C. $36g$ of $H_{2}O$

$N_A$ molecules are present in $1$ mole of $H_{2}O$ i.e $18g$

So, $36grams$ of $H_{2}O$ has $2\times 6.02\times {10}^{23}=12.04\times {10}^{23}$ molecules.

D. $64g$ of $S{O}_2$

$N_A$ molecules are present in $1$ mole of $S{O}_2$ i.e $64g$

So, $64grams$ of $S{O}_2$ has $6.02\times {10}^{23}$ molecules.