Question

mass of 0.5 mole of nh2conh2 (urea) is​

Answer 1

Explanation:

Calculate the mass of urea required in making 2.5kg of 00.25 molar aq solution

Calculate the mass of urea required in making 2.5kg of 00.25 molar aq solutionGiven that.Mass of solution = 2.5 Kg.Molality = 0.25 m.Molar mass of urea (NH2CONH2) =14 + 2 × 1 + 12 + 16 + 14 + 2 × 1 = 60 g mol−1.Let mass of urea (NH2CONH2) = w gram.Number of moles of urea = w / 60 = 0.01667 mol.

Answer 2

Answer:

The mass of 0.5 moles of urea is equal to 30 grams.

Explanation:

Given, the number of moles of urea = 0.5 moles

The molar mass of urea NH₂CONH₂ = 2(14) + 4(1) + 12 + 16 = 60 g/mol

The molecular mass of  any compound is the mass of one mole.

Therefore, 1 mole of urea has mass = 60g

Then, 0.5 moles of urea will have mass = 60×0.5 =  30g

Therefore, the mass of 0.5 moles of urea is equal to 30g.

More about urea:-

• Urea is also known as Carbamide which is diamide of carbonic acid.
• Urea is used as a fertilizer, a feed supplement, and a starting material of drugs and plastics manufacture.
• Urea is a colorless substance. It exists in the crystalline form and   melts at 132.7°C and decomposes even before the its boiling point.

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