Question

A compound posses 8% sulphur by mass. The least molecular mass is
a)200
b)10
c) 155
d) 355
​

Answer 1

let the compound be = x

now

mass of sulphur is = 32

it says compound contains 8%

so

8% of x = 32

so

8x/100 = 32

8x = 3200. (by cross multiply)

x= 3200/8

x = 400