How many atoms in 3.5 moles of Ca

Hey there!

There are 6.022 x 10²³ atoms of copper in one mole of copper.

So, multiply 6.022 x 10²³ by 3.5.

3.5 x 6.022 x 10²³

21.077 x 10²³

2.1077 x 10²⁴

There are 21.077 atoms in 3.5 moles of Ca.

Hope this helps!