Chemistry, asked by jeykanth, 3 months ago

What is the mass of urea required in making 2.5kg of 0.25 molal aqueous solution?

Answers

Answered by ferozpurwale

Answer:

015kg15g×2. 5kg = 37 g.

Explanation:

A solution of concentration 1 mol/Kg is also denoted as 1 molal. For example, 1.00 mol/Kg solution of KCl means that 1 mole (74.5 g) of potassium chloride in 1kilogram of water. This means 0.25 molal aqueous solution of urea, expressed as 0.25 moles of urea dissolved in 1000 g of water. The correct answer is option A.

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