Question

5) calculate the mass percent of a solution prepared by dissolving 15.4 g of C.H,O, in 74.6 g of waterEnter your answer using three significant figures and no units.

Answer 1

The first step we have to follow is to add the given mass to find the total mass of the solution:

`M=15.4g+74.6g=90g`

Now, divide the mass of the solute by the mass of the solution and multiply it times 100 to find the percent by mass:

`\%m/m=(15.4g)/(90g)\cdot100=17.1\%`

The percent by mass of the solute in the solution is 17.1%.