Question

How can we calculate the mass if number of particles are given for oxygen gas

Answer 1

Let given atoms of oxygen gas be x.

Since mass of 2*6.023 * 10^23 atoms of oxygen gas = 32g.

Hence. mass of 1 atom of oxygen gas
=) 32/ 6.023*10^23 g

Hence mass of x number of atoms of oxygen gas =) 32/ 6.023*10^23 * x g.

Hope it's helpful to u.