What is the mass of glycine in a 400-g sample of a solution that is 2.5%(w/w)?

Name: What is the mass of glycine in a 400-g sample of a solution that is 2.5%(w/w)?
Brand: Quizplus
Rating: 4.9 (44 reviews)

Question

Quizplus · Accepted Answer

2.5% (w/w) means that there are 2.5 g of glycine in every 100 g of the solution. 
Therefore, in a 400-g sample of the solution, there would be:

(2.5 g glycine / 100 g solution) x (400 g solution) = 10 g glycine

So, the mass of glycine in a 400-g sample of the solution is 10.0 g. Therefore, the correct answer is choice C.

What Is the Mass of Glycine in a 400-G Sample