80 grams of neon = _________ atoms of neon?

Question

1.2 × 10²⁴

4.8 × 10²⁴

2.4 × 10²⁴

6.0 × 10²³

Answer 1

Hi Alondra!

Let's start off with what we know. We have 80 grams of Neon. Now, we want to convert grams to atoms.

The molar mass of Neon is 20.18 grams/mol. We also know that one mole has 6.02 x 10²³ atoms. Now we can use stoichiometry!

When doing stoichiometry, we always start off first with the value that we know. Therefore, we start with 80 grams. Also, remember that the units must cancel out accordingly!

80 grams x (1 mol / 20.18 grams) x (6.02 x 10²³ atoms / 1mol) = 2.4 × 10²⁴ atoms