KMnO4:K - 39.10Mn - 54.94O - 16.00 (4 atoms)
Molar mass = 39.10 + 54.94 + 16.00(4) = 158.03 g/mol
ZnCl2:Zn - 65.38Cl - 35.45 (2 atoms)
Molar mass = 65.38 + 35.45(2) = 136.28 g/mol
LiOH:Li - 6.94O - 16.00H - 1.01
Molar mass = 6.94 + 16.00 + 1.01 = 23.95 g/mol
KMnO4:
K - 39.10
Mn - 54.94
O - 16.00 (4 atoms)
Molar mass = 39.10 + 54.94 + 16.00(4) = 158.03 g/mol
ZnCl2:
Zn - 65.38
Cl - 35.45 (2 atoms)
Molar mass = 65.38 + 35.45(2) = 136.28 g/mol
LiOH:
Li - 6.94
O - 16.00
H - 1.01
Molar mass = 6.94 + 16.00 + 1.01 = 23.95 g/mol