(b) 
(c)
(d)
CO
Answer:
(a) Number
of atoms in 
= Number of C
atoms + Number of O atoms = 1 + 3 = 4
(b) Number
of atoms in 
Number of P atoms + Number
of O atoms= 1 + 4 = 5
(c) Number
of atoms in 
Number of P atoms + Number
of O atoms = 2 + 5 = 7
(d) Number of atoms
in CO = Number of C atoms + Number of O atoms = 1 + 1 = 2
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