Question

four samples of h2o were prepared using different methods. Each sample on analysis was found to contain 12.5% hydrogen and rest oxygen. Name the law which is in agreement with this observation

Answer 1

The law which agrees with this observation is "The law of definite Proportion". Water(H2O) contains two atoms of Hydrogen and one atom of Oxygen. The atomic mass of Hydrogen is 1 and that of Oxygen is 16. So, mass of two hydrogen atoms is 2 and mass of one Oxygen atom is 16. According to law of definite proportion, This ratio wil be constant in any sample of pure water i.e. ratio of 2:16 or 1:8.

Answer 2

it will be in 1:8 ratio