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Earlier discussion
3 older comments kept for context.
Efua
Cu= 64
Relative molar mass= 160g/mol
[ 64+32+(16×4) ] = 160g/mol
1gm = 10dgm
160÷64= 2.5
Mass = 2.5÷10
Mass=0.25g
Firdausi Adamu Jajere
Tnxxx
Blossom
Can someone give an explanation