Question

Find the number of g atoms and weight of an element having 2 x 102 atoms. Atomic mass of element is 32.

(A) 0.22g atom, 9.2 g
(B) 0.22g atom, 8.2 g
(C)0.33g atom, 10.6 g
(D) 0.33g atom, 9.6g​

Answer 1

Answer:

(C) 0.33g atom, 10.6 g

Explanation:

1 mole = 6.023 × 10^23

Therefore, Atom = 1/ 6.023×10^23

2 × 10^23 atom = 2×10^23 / 6.023×10^23

2 × 10^23 atom = 0.33 mol

Therefore element given is = 0.33 g of atom

6.023 × 10^23 = 32 g

Therefore, 2×10^23 atom = 32×2x10^23 / 6.023×10^23

2×10^23 atom = 10.627 g

And Hence, option (c) is correct.

0.33 g of atom and 10.6 g is weight of element.

By

Aaditya Singh