what is the molality of the solution?

Question

a) 12.5g NaHCO3 in 350.0 mL solution
b) 45.0g H2SO4 in 300.0 mL solution
c)30.0g NaCl dissolved to make 500.0 mL solution

Answer 1

Molality=kg/L
a) (12.5/1000)/0.35=0.357142857 MOLALITY
b) (45/1000)/0.3=0.15 MOLALITY
c) (30/1000)/0.5=0.06 MOLALITY

Answer 2

molality is simply kilograms over liters so these are all fairly simple. you dont even need to convert them to kg and L on this one
a).035
b).150
c).060