Question

Calculate the number of moles of 25g of ammonia(Nh3)
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Answer 1

Answer:

The number of moles of 25 g of ammonia is 1.785 moles

Explanation:

1-mole represents the Avogadro number of the particle

Number of moles(n) = given mass(m) ÷ molecular mass(M)

Here given mass of ammonia = 25 g

The Chemical formula of ammonia is $NH_{3}$

The atomic mass of nitrogen is 14

The atomic mass of hydrogen is 1

∴The molecular mass of ammonia = 14 +3 = 17  g / mol

Therefore, the number of moles of ammonia, n =$\frac{m}{M}$

 n = $\frac{25}{17}$

 n = 1.785 moles.