A sample of a substance containing only magnesium and chlorine was tested in the lab and was found to be composed of 74.5% chlor

Question

3 years ago

10

A sample of a substance containing only magnesium and chlorine was tested in the lab and was found to be composed of 74.5% chlor

ine by mass. If the total mass of the sample was 190.2 grams, what was the mass of the magnesium?
A) 24.3 g B) 48.5 g
C) 70.9 g D) 142 g
I know the answer is B, but I don't understand why.....

Chemistry

1 answer:

chubhunter [2.5K] · Answer 1 · 2022-08-31T00:40:04+03:00

chubhunter [2.5K]3 years ago

8 0

Use a ratio to find out that x/190.2 = 74.5/100

hope this helps