Question

26) Number of atoms of in 20 gm of helium
are
A) 3 x 1023
B) 30.11 x 1022
C) 30.11 x 1023 D) 30.11 x 10-23​

Answer 1

Answer:

B......................

Answer 2

Answer:

c) 30.11×10^23

Explanation:

there are five mole of helium present in 20 gm helium

6.022×10^23 atom present in one mole

then,

5×6.22×10^23=30.11×10^23