Calculate the number of moles present in:
34 g of ammonia

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Solution

Given: Weight of ammonia= 34 g
Formula to calculate number of moles is:
$N u m b e r o f m o l e s = \frac{G i v e n w e i g h t o f t h e s u b s \tan c e}{M o l a r m a s s o f t h e s u b s \tan c e}$
Step-1: Calculate the Gram molecular weight of Ammonia (NH₃)
Gram molecular weight of Ammonia= Gram atomic weight of Nitrogen+ 3(Gram atomic weight of Hydrogen)
Gram molecular weight of Ammonia= 14+3(1)
Gram molecular weight of Ammonia= 17 g mol^-1
Step-2: Calculate the number of moles
By substituting the values in the above formula
$N u m b e r o f m o l e s = \frac{34}{17} = \frac{2}{1} = 2$
Therefore, the number of moles present in 34 g of ammonia is 2 mol.

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Calculate the number of moles present in:34 g of ammonia

Calculate the number of moles present in:
34 g of ammonia