Question

you wanted a 1.8 M of KMNO4 and we know that the molecular weight of KMno4 is 158 g/mole how can we make the solution?

Answer 1

v=m/c
Where
m is mass you can put that as 158g/mol possibly
c is concentration so the 1.8M
v is volume
I don't know if this would work though sorry!

Answer 2

I will try to answer it the way you explained it, thanks a lot though!