Question

some Lake water is 1.25 gram per ml inverse and contains 92 of Na positive ions per kilogram of water calculate the molality of Na positive ions in the lake​

Answer 1

Answer:

It is mentioned 92 g for 1kg

So for 1.25 kg it has 115g

Explanation:

Moles=115/23=5

Density=mass/volume

Density×volume=mass

1250gm=mass

1.25 kg = mass

Molality=moles/mass

=5/1.25

=4