the concentration of urea in a solution prepared by dissolving 16g of urea in 39 g of H2O is ________% by mass. The molar mass of urea is 60.0 g/mol
(g solute/g solution)*100 =
[16/(16 + 39)]*100 = ?
0.29
29.09
To find the concentration of urea in the solution as a percentage by mass, we need to determine the total mass of the solution and then calculate the mass of urea as a percentage of the total mass.
First, let's find the total mass of the solution by summing the masses of urea and water:
Total mass = mass of urea + mass of water = 16g + 39g = 55g
Next, we can calculate the mass of urea as a percentage of the total mass:
Mass of urea = 16g
Percentage of urea = (Mass of urea / Total mass) x 100%
= (16g / 55g) x 100%
= 29.09%
Therefore, the concentration of urea in the solution is approximately 29.09% by mass.