Question

a piece of copper weighs 0.635 g. how many atoms of copper does it contain?​

Answer 1

Answer:

Gram atomic mass of copper=63.5 g

No. of moles in 0.635g of copper = 0.635/63.5=0.01

No. of copper atoms in 0.01 mole=

0.01×6.02× 10 power 23

=>6.02 ×10 power 21