Answer:
Molar mass
of lead sulphate
= atomic
mass of Pb + atomic mass of S
+ 4 x atomic
mass of O
= 207 + 32 +
4 x 16
= 207+32+64
=303 u
(b) Molar
mass of calcium phosphate
= 3 x atomic
mass of Ca + 2 x (atomic mass of P + 4 x atomic mass of O)
= 3 x 40 + 2x
(31 + 4x16)
= 120 + 2x (31
+ 64) =120 + 2x95
= 120 +190 = 310 u
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