khairul080802 khairul080802

14-02-2021
Chemistry

contestada

how many grams of NaCI per kilogram of water are present in a 2.7 molal aqueous solution

Respuesta :

maacastrobr maacastrobr

19-02-2021

Answer:

157.79 g

Explanation:

The definition of molality is:

molality = moles of solute / kilogram of solvent

This means that in a 2.7 molal solution, there are 2.7 moles of NaCl per kilogram of water.

So now we convert those 2.7 moles of NaCl to grams, using its molar mass:

2.7 mol * 58.44 g/mol = 157.79 g

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