Question

How many atoms of hydrogen are there in 36 gram of NH4

Answer 1

The formula mass of ammonia is 14 + 1 × 3 = 17.

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.

Answer 2

The answer is 4.8176 × 10²⁴ atoms

GIVEN

Mass of NH₄ = 36 grams

TO FIND

Number of atoms of Hydrogen.

SOLUTION

The question cab be solved as follows;

Given,

Mass of NH₄ = 36 grams

It is known,

Mass of 1 mole of NH₄ = 18 grams

Number of moles on NH₄ in 36 grams = 2 moles

Now,

Number of molecules in 1 mole of NH₄ = 6.022 × 10²³ molecules.

Number of molecules in 2 moles of NH₄ = 2 × 6.022 × 10²³ = 12.044 × 10²³ molecules.

We know that,

Number of Hydrogen atoms in 1 molecule of NH₄ = 4

Number of atoms of Hydrogen in 12.044 × 10²³ molecules of NH₄ = 4 × 12.044 × 10²³ = 48.176 × 10²³ atoms = 4.8176 × 10²⁴ atoms.

Hence, The answer is 4.8176 × 10²⁴ atoms

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