Question

determine the formula mass of the following compound


please answer me quick
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Answer 1

formula mass = 65.5*3+(31+4*16)*2 = 196.5+190 = 386.5u

Answer 2

mass of cu=65.5 or 66

mass of P=31

mass of O=31

65.5×3+(31×2+16×4×2)

196.5+190

ans=386.5