Question

What is the mass of oxygen required to react completely with 15 g of H2 gas to form water...explain in detail

Answer 1

4g of H2 react with 32 g of 02

15 g of H2 react with 32/4*15g of O2

= 120g of 02

Answer 2

Answer:

120 gm

Explanation:

Ratio in which O2 and H2 combine by mass to form water = 1:8

So, 1/8 = 15/x

where, x = mass of O2 required to combine completely with 15 gm H2.

Solving above, x = 15 × 8 = 120 gm