Question

Find the number of moles in 3.30 g of (NH4)2SO4?

A. 0.0250 mol

B. 0.0279 mol

C. 132.1 mol

D. 40.0 mol

Answer 1

Hey there!

Molar mass ( NH4)2SO4 =  132.1395 g/mol

So:

1 mole  ( NH4)2SO4 ---------------- 132.1395 g

moles (NH4)2SO4 ----------------- 3.30 g

moles (NH4)2SO4 = 3.30 * 1 / 132.1395

moles (NH4)2SO4 = 3.30 / 132.1395

=> 0.0250 moles of (NH4)2SO4

Answer A

Hope that helps!

Answer 2

Your answer should be: 0.0250 mol

Hope this helps!