Diwali is the five-day festival of lights, celebrated by millions of Hindus, Sikhs and Jains across the world. The festival, which coincides with the Hindu New Year, celebrates new beginnings and the triumph of good over evil and light over darkness.
The law of definite proportions, also known law of definite composition, states that regardless of the amount, a pure compound always contains the same elements in the same proportions by mass.
The law of multiple proportions, also known as Dalton's law, was proposed by the English chemist and meteorologist John Dalton in his 1804 work, A New System of Chemical Philosophy. It is a rule of stoichiometry.