Question

a compound posseses 8% sulphar by mass.what is its least molecular mass?

Answer 1

As the sulphur present is 8% by mass and minimum weight of sulphur in the compound can be 32 gm. 
It means 8% mass of the compound = 32 gm. 
or the molecular mass =32/8*100 
=400 gm.

Answer 2

Answer:

400 gm

Explanation:

As the sulphur present is 8% by mass and minimum weight of sulphur in the compound can be 32 gm.  

It means 8% mass of the compound = 32 gm.  

or the molecular mass =32/8*100  

=400 gm.