Question

how many atom of H and S contains in 0.40 moles of H2s ​

Answer 1

$\huge\mathfrak\blue{Answer}$

1mole = 1 gram atom.

Therefore,

0.40 mole of H2S contains 2 x 0.40 = 0.80 gram atoms of H and 0.40 gram atoms of S.

Answer 2

Answer:

Answer in the attachment