Question

The ratio of gram-atomic weight of nitrogen and oxygen is:

Answer 1

Molecular mass is the mass of a molecule. Molar mass is the mass of one mole of a compound. Nitrogen having the atomic weight 14. Oxygen having the atomic weight 16.

Complete step by step answer:
N is a group 15 element having atomic number 7 and mass number 14. O is a group 16 element having atomic number 8 and mass number 16.
So, the ratio of gram atomic weight of nitrogen and oxygen will be $\dfrac{{14}}{{16}} = \dfrac{7}{8}$
Additional information:
An element can be represented by a general symbol ${_z^A}X$ .
A represents the mass number.
Z represents the atomic number.
X represents the element.
Every atom has a nucleus which has a positive charge. A nucleus has protons and neutrons, Protons are positively charged species and neutrons are chargeless species. These neutrons and protons are collectively called nucleons. Each nucleus will be surrounded by electrons. Electrons are negatively charged. The number of protons and electrons will be the same. Mass number is the sum of protons and neutrons. Difference between the mass number and atomic number will give the number of neutrons.

Note: Atomic mass of an element is the number that expresses how many times the mass of an atom of the element is greater than $\dfrac{1}{{12}}$ the mass of an $^{12}C$ atom. It is expressed in amu. Amu is the $\dfrac{1}{{12}}$ the mass of ${C^{12}}$ . Atomic mass of N is 14, that means the mass of N is 14 times greater than $\dfrac{1}{{12}}$ the mass of an ${C^{12}}$ atom.