Question

If 1 mole of an unknown metal has mass of 63.55 grams, what metal is it?

Answer 1

we have formula of mole that...

Mole = Mass ÷ Atomic weight

mole = 1

mass = 63.55 grams

Atomic weight = mass ÷ mole

Atomic weight = 63.55 grams/mole

we know that 63.55 grams/mole is copper's atomic weight...

so unknown metal is copper(Cu)