1.

Relative molecular mass of CaSO4D134 amu2) 130 amu3138 amu4) 136 amu​

Answer»

ANSWER:

option 3 is correct

Explanation:

ca=40

s=32

o=14. o4=(16*4)=64

CASO4= 40+32+64= 138

option 3 is correct



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