The valency of metal"M"is 3. what is the correct molecular formula of metal sulphate?

M2(So4)2

Explanation:

Here,

The symbol of metal is M and the symbol of sulphate is So4.

And the,

Valency of metal is 3 and the valency of sulphate is 2..

SO,

M So4

3 2

And when we cross multiply it the formula will be,

M2(So4)2

Hope that it will help u to understand !!

that's what i got you can count the number of atoms

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.