Question

what is the mass in grams of following:(1) two mole of Cu.

Answer 1

Hello Mate!

Since atomic mass of Cu (Copper) is 63.5 g/mol.

[ Note : Atomic mass is sum of number of proton and neutrons. ]

This means that 1 mole of Cu weight = 63.5 g

Then by using unitary method we get that,

2 mole of Cu weight = 2 × 63.5 g

So 2 mole of Cu weight = 127 g

Hence mass of 2 moles of Cu in grams is 127.

Thanks!!!

Have great future ahead!