Question

You have a 155-g sample of Al₂O₃. If there are 22.5 g of Al in the solution, what is the percent by mass of the solute?

A. 14.52%

B. 16.13%

C. 22.50%

D. 87.10%

Answer 1

The percent by mass of the solute in the solution is 14.52%.

Step-by-step explanation:

To find the percent by mass of the solute, we need to divide the mass of the solute (22.5 g) by the mass of the sample (155 g) and multiply by 100%.

Percent by mass = (mass of solute / mass of sample) x 100%

Percent by mass = (22.5 g / 155 g) x 100% = 14.52%

Therefore, the correct answer is A. 14.52%.