Question

60 gm of sugar dissolves in water of mass 240 gm then

Answer 1

Answer:

Molality = 0.731 moles per kilograms of water

Explanation:

We need to write down the formula of sugar.

C12H22O11

Molar mass of sugar = 12 × 12 + 22 × 1 + 16 × 11 = 342 g/mol

Moles of sugar = 60/342 = 0.17544 moles

0.17544 moles —> 240 grams

Molality = moles of solute per kilogram of solvent.

0.17544 moles — 240 grams

? — 1000 grams

1000/240 × 0.17544 = 0.731 moles per Kg of solvent.

This is the molality of sugar in water.

Molality = 0.731 moles per kilograms of water.