How many moles of copper are present in 75.92 g?

The Atomic Mass of Copper is 63.5 grams One mole of any element has a mass equal to the atomic mass.

0.75 grams of Cu = x moles of Cu

63.5 grams of Cu = 1 mole of Cu

Set up a proportion and solve for x

Divide

0.75 / 63.5 = x /1

0.75 ÷ 63.5 = x