Question

A sample of NH3 molecule irrespective of source contains 82.35% Nitrogen and 17.65% of Hydrogen by mass. This data supports: 1 . Law of Conservation of Mass 2. Las of Multiple Proportions 3. Law of Definite Proportions 4. Avogadro’s Law

answer these​

Answer 1

Answer :

Mass composition of N = 82.35%

Mass composition of H = 17.65%

Atomic weight of N = 14g/mol

Atomic weight of H = 1g/mol

◈ No. of moles $:$

➝ N : 82.35/14 = 5.88

➝ H : 17.65/1 = 17.65

◈ Mole ratio :

➝ N : H = 5.88/5.88 : 17.65/5.88

➝ N : H = 1 : 3 [NH$_3$

This data supports Law of definite proportions.

• The ratio of the masses of elements in any compound is constant regardless its source or its preparation i.e., a given compound always contains exactly the same proportion of elements by weight.
• It is sometimes also referred to as law of definite composition.