Question

How many atoms of hydrogen are there in 36 g of NH4?

Answer 1

The number of moles in 27.6g ammonia is 27.6 ÷ 17 = 1.62 mol. A mole is 6.02 × 10²³, so the number of hydrogen atoms in a 1.62 moles of ammonia is 1.62 × 6.02 × 10²³ × 3 = 2.93 × 10²⁴ atoms.

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Answer 2

$NH_{4}$Answer:

$48.176$ × $10^{23}$ atoms

Explanation:

Given mass of $NH_{4}$ = 36 g

Molar mass of $NH_{4}$ = (14 + (1 × 4)) g $mol^{-1}$

                                = 18 g $mol^{-1}$

In 18 g of  we have 4 g of $H$

In 36 g ''    ''     ''      $36$×$\frac{4}{18}$ g of $H$ = 8 g of $H$

No. of moles of $H$ = 8 $mol$

no. of atoms of $H$ = 8 × 6.022 × 10²³

                             = $48.176$ × $10^{23}$  (ANS)