Question

moles of Cr in 4.89×1023 atoms of Cr

Answer 1

moles of in 4.89×10^23 atoms of Cr

Answer 2

divide number of atoms by avogadros number gives you 0.812 moles

Answer 3

if you want to express it as grams you need to multiply the number of moles 0.812 by the molecular weight of Cr which is 52 g or 0.052kg

Answer 4

Ok. thanks for your help.