The following table lists molar concentrations of seven major ions in seawater. Using a density of 1.022 g/mL for seawater, convert the concentrations for the following two ions into molality.

The magnesium ion: ?

The chloride ion: ?

Na+ : 10.781 g/kg 480.57 mM
K+ : 0.399 g/kg 10.46 mM
Mg+2 : 1.284 g/kg 54.14 mM
Ca+2 : 0.4119 g/kg 10.53 mM
Cl- : 19.353 g/kg 559.40 mM
(SO4)-2 : 2.712 g/kg 28.93 mM
(HCO3)- : 0.126 g/kg 2.11 mM
Total : 35.067 g/kg n/a

Question

The following table lists molar concentrations of seven major ions in seawater.  Using a density of 1.022 g/mL for seawater, convert the concentrations for the following two ions into molality.

The magnesium ion: ?

The chloride ion: ?

Na+  :  10.781 g/kg    480.57 mM
K+  :  0.399 g/kg    10.46 mM
Mg+2  :  1.284 g/kg    54.14 mM
Ca+2  :  0.4119 g/kg    10.53 mM
Cl-  :  19.353 g/kg    559.40 mM
(SO4)-2  :  2.712 g/kg    28.93 mM
(HCO3)-  :  0.126 g/kg    2.11 mM
Total  :  35.067 g/kg    n/a