Question

what percentage of hydrogen is present in 15gm of water​

Answer 1

atomic mass: Hydrogen H=1

Oxygen=16

Molecular mass of water=H2O

1*2+16

2+16

18

Therefore molecular mass of water =18gm not 15gm

Molecular mass of hydrogen in water=2gm(1*2)

percrntage of hydrogen in 18gm of water=2/18*100

=11.11%

Answer 2

Answer:

8.5gm

Explanation:

use the formula please