Question

how many gram atoms of H and S are contained in 0.40 mole of H2S

Answer 1

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 : 0.8 gram atoms of H and 0.4 gram atoms of S are present in 0.40 mole of $H_2S$

Solution :

In $H_2S$, there are 2 number of hydrogen atoms and 1 number of sulfur atom.

As we know that 1 mole is equal to the 1 gram atom

As, 1 mole of $H_2S$ contains 2 gram atoms of H

So, 0.40 mole of $H_2S$ contains $2\times 0.40=0.8$ gram atoms of H

As, 1 mole of $H_2S$ contains 1 gram atoms of S

So, 0.40 mole of $H_2S$ contains $1\times 0.40=0.40$ gram atoms of S

Therefore, 0.8 gram atoms of H and 0.4 gram atoms of S are present in 0.40 mole of $H_2S$