Question

The molality of a solution of ethyl alcohol in water is 1.55m.how many grams of ethyl alcohol are dissolved in 2kg of water​

Answer 1

Answer:

Molality = moles of solute/ Kilograms of solvent.

So we have 1.55=moles of EtOH/kg water

We have 2kg of water.

So 1.55=x/2

1.55•2= 3.1

So that is x=3.1 moles of EtOH

Molar mass of EtOH = 46.07 g/mol

3.1 moles EtOH • 46.07 g/mol = 142.817 grams of EtOH.

I think you got it