Question

The molality of glucose when 0.015 moles of glucose dissolved 30 g of water.

Answer 1

Given:

Moles of glucose = 0.015

Quantity of water = 30g

To Find:

Molality of Glucose when dissolved in water

Solution:

Molar mass of water = 18 gm

Moles of water = 30/18 = 1.66  

Molar mass of glucose = 180 gm

​Moles of glucose = 0.015

Molality = moles of solute × 1000/ Mass of solvent

Molality = 0.015 × 1000/30= 0.5

Answer: The molality of glucose is  0.5 mol / kg

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