Question

What is the molar mass of potassium sulfide? (Hint: Figure out the formulafirst with charges!).Answer options110.26 g/mol158.26 g/mol71.16 g/mol174.26 g/mol

Answer 1

• The formular for Potassium sulfide :

K 2+ + s -1

→2K + S = K2S

then , Molar mass for K = 39,098

Molar mass for S = 32.065

Molar Mass for K2S = (39.098 *2 ) + (32.065)

=110.26g/mol

• So ,option 1 is the correct choice . Molar mass for K2S =110.26g/mol.