Question

46. The number of atoms in 0,5 mole of H2O is
(NA= 6.0 x 1023 mol-1)​

Answer 1

Answer:

Total no of atoms = 9.033 × 10²³

Explanation:

Each water molecule has 2 hydrogen atoms and 1 oxygen atom.

⇒ The no of moles of oxygen atoms = 0.5 moles

& The no of moles of hydrogen atoms = 0.5 × 2 = 1 mole

- The no of atoms of oxygen = 0.5 × 6.022 × 10²³ = 3.011 × 10²³

- The no of atoms of hydrogen = 1 × 6.022 × 10²³ = 6.022 × 10²³

- Total no of atoms = 3.011 × 10²³ + 6.022 × 10²³

⇒ Total no of atoms = 9.033 × 10²³