Question

How many electrons are there in 2 g of H2

Answer 1

6.02 x 10²³ electrons

Step-by-step explanation:

Given parameters:

Mass of H₂ = 2g

Unknown:

Number of electrons = ?

Solution:

To find the number of electrons, we must determine the number of moles of H₂ first.

Number of moles =
`(mass)/(molar mass)`

Molar mass of H₂ = 2(1) = 2g/mol

Number of moles =
`(2)/(2)` = 1mol

1 mole of a substance contains 6.02 x 10²³ particles

the particles can be protons, neutrons, electrons

So,

2g of H₂ will contain 6.02 x 10²³ electrons.