Question

39.4 kg of gold was recovered from a smuggler. The number of atoms of gold recovered are –

(At. mass of gold = 197)

(A) 200 (B) 1.2044 × 1025

(C) 6.022 × 1025 (D) 1.2044 × 1026​

Answer 1

Answer:

The molar mass of gold = 196.97 g

Number of atoms = given mass / molar mass × 6.022 x 1023 atoms

⇒39.4 g /196.97 g × 6.022 x 1023 atoms = 1.2 × 10^23 atoms of gold.