Calculate the molecular mass
a. PCl5
b. K2S
[ Given: Atomic mass of P = 31u, Cl = 35.5u, K = 39U, S = 32U]
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Answer:
Formula unit mass of ZnO=(Atomic mass of Zn)+(Atomic mass of O)
=(65+16)u =81u
Formula unit mass of Na
2
O=(2×23)+16
=62u
Formula unit mass of K
2
CO
3
=(2×39)+12+(3×16)
=138u
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