Which one of the following has different number of molecules ? (All are kept at normal temperature and pressure)

3 gram of Hydrogen

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48 gram of Oxygen

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42 gram of Nitrogen

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2 gram of Carbon

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Solution

The correct option is D 2 gram of Carbon
Number of moles of $3 g$ of $H$ , $48 g$ of $O$ , $42 g$ of $N$ $= 3$ moles
$2 g$ of $C$ have= $0.167$ moles
So Answer is D.

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Which one of the following has different number of molecules ? (All are kept at normal temperature and pressure)

The correct option is D 2 gram of CarbonNumber of moles of 3g of H,48g of O,42g of N=3 moles2g of C have=0.167 molesSo Answer is D.

The correct option is D 2 gram of Carbon
Number of moles of $3 g$ of $H$ , $48 g$ of $O$ , $42 g$ of $N$ $= 3$ moles
$2 g$ of $C$ have= $0.167$ moles
So Answer is D.