Question

(Note: from Ncert book science class 10) 10g of hydrogen burnet in the presence of excess oxygen. The mass of water (H2O) formed -: a) 90g b) 45g c) 10g d) 18g

Answer 1

Answer:

Option a) 90g

Explanation:

Since H2+1/2O2--- H2O

So 2g of H2 gives 18g of H20

Therefore

10g of H2 gives x g of H2O

2/18=10/x

Therefore x= 10*18/2

x=5*18=90g

Hence 10g of H2 gives 90g of H2O