How many atoms are in 173 g of Calcium?

Answer 1

Hi Katlyn!

To find the number of atoms in 173 grams of calcium, you'll first need to convert the mass of calcium to moles of calcium:

moles of calcium = 173 grams calcium x (1 mole calcium/40.08 grams calcium) = 4.32 moles calcium

You'll then find the number of atoms of calcium by multiplying the number of moles by Avogadro's number:

atoms of calcium = 4.32 moles calcium x (6.022 x 10²³ atoms calcium / 1 mole calcium) = 2.60 x 10²⁴ atoms calcium

There are 2.60 x 10²⁴ atoms of calcium in 173 grams of calcium.

Hope this helps!

Best,

Josiah T.