Question

How many grams are in 2.190mol Mg2(SO4)3?

Answer 1

Mass MgSO₄ = 262.8 g

Further explanation

Given

2.190 mol MgSO₄

Required

mass

Solution

The molecular formula should be MgSO₄

So MW MgSO₄ :

= Ar Mg + Ar S + 4. Ar O

= 24 + 32 + 4. 16

= 120 g/mol

Mass MgSO₄ :

$\tt mass=mol\times MW\\\\mass=2.19\times 120\\\\mass=262.8~g$