Respuesta :

Answer:

Moles of Cr in 4.36×1023 atoms of Cr?

I mass of Cr = 52.00

A's# = 6.02x10^23

I don't know how to approach this. Help?

Update:

Moles of Cr in 4.36×10^23 atoms of Cr?

Update 2:

ALSO......

moles of Cu in 9.7×10^21 atoms of Cu?

moles of C2H6 in 2.75×10^23 molecules of C2H6?

Explanation:
There are 3.567599 atoms in moles of copper