Question #33d48

1 Answer
Apr 10, 2017

3.01 * 10^23

Explanation:

I assume you're referring to hydrogen gas.

M_r H_2 = 2

First, find number of moles of hydrogen gas.

Number of moles of H_2 = (1g)/(2g/(mol)) = 0.5 mol

1 mol of H_2 has 6.02 * 10^23 (Avogadro's constant) H_2 molecules.

Hence, 0.5 mol would have half of that which is 3.01* 10^23 molecules of H_2.