Irrespective of the source, pure sample of `H_2O` always contains 88.89% by mass of oxygen and 11.11% by mass of hydrogen. State the law.

Irrespective of the source, pure sample of H_2O always contains 88.89% by mass of oxygen and 11.11% by mass of hydrogen. Which law is illustrated here?

Determine the empirical formula of an oxide of iron which contains 69.9% iron and 30.1% oxygen by mass.

Calculate the mass % of oxygen in Fe_(3)O_(4)

A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is

In each of the following question, an Assertion (A) is following by a corresponding Reason (R ). Use the following keys to choose the appropriate answer. Assertion : 12 parts by mass of carbon combine with 16 and 32 parts by mass of oxygen to from CO and CO_2 respectively. Reason : A given compound always contains exactly the same proportion of elements by weight.