Which one of the following represents the number of molecules of ammonia present in $34 g$ of ${N H}_{3}$ ?

17 \times 10^{23}

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34 \times 10^{23}

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6.023 \times 10^{23}

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12.064 \times 10^{23}

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Solution

The correct option is C $12.064 \times 10^{23}$
$Moles= 34/17= 2$
$Molecules= 2\times 6.023\times 10^{23}= 12.064\times 10^{23}$

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Which one of the following represents the number of molecules of ammonia present in 34 g of NH3?

The correct option is C 12.064×1023

Which one of the following represents the number of molecules of ammonia present in $34 g$ of ${N H}_{3}$ ?

The correct option is C $12.064 \times 10^{23}$
$Moles= 34/17= 2$
$Molecules= 2\times 6.023\times 10^{23}= 12.064\times 10^{23}$