The number of moles of ammonia in 346g sample of pure NH₃ is 20.35 moles.
Number of moles:
It is defined as the ratio of given mass over molar mass.
\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)
Given:
Mass of NH₃ = 346 g
To find:
Number of moles=?
We know, Molar mass of NH₃= 17g/mol
On substituting the values,
\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\\text{Number of moles}=\frac{346}{17} \\\\\text{Number of moles}=20.35 moles\)
So, the number of moles of ammonia will be 20.35 moles.
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