Question

in a certain​ chemical, the ratio of zinc to copper is 3 to 13. A jar of the chemical contains 546 grams of copper. How many grams of zinc does it​ contain?

Answer 1

Ratio
Zinc : copper
3 : 13

Copper =546 g
Since you’ve got the grams of copper and the ratio you divide them together so that you get one part of copper

546/13=42

Now you do 42x3=126 which is the zinc

Answer 2

The answer is 126 grams of zinc because 546/13 is 42 and 42x3 is 126 giving you the answer 126 grams