Question

Calculate the number of hydrogen atoms in 1 mole of H2.

Answer 1

Answer- The above question is from the chapter 'Some Basic Concepts of Chemistry'.

Concept Used: 1) Number of moles = $\frac{Given \: mass}{Molar \: mass}$

2) No. of molecules = Number of moles × Avogadro's Number

(Let Avogadro's Number be 6.02 × 10²³.)

Given question: Calculate the number of hydrogen atoms in 1 mole of H₂.

(Atomic mass of H = 1 u.)

Answer: Given mass of Hydrogen = 2 g

Molar mass of Hydrogen = 2 [H] = 2 [1] = 2 g

No. of moles = $\frac{Given \: mass}{Molar \: mass}$ = $\frac{2}{2}$ = 1 mole

Number of hydrogen atoms in H₂ = 2

Number of hydrogen atoms in 1 mole of H₂ = 1 × 2 × 6.02 × 10²³

                                                                           = 12.04 × 10²³

                                                                           = 1.204 × 10²⁴ atoms

∴ Number of hydrogen atoms in 1 mole of H₂ = 1.204 × 10²⁴ atoms

Answer 2

Explanation:

hey mate your answer is 1.204 × 10^24 atoms