Answer:
69 grams
Step-by-step explanation:
In a certain chemical, the ratio of zinc to copper is 3 to 13. A jar of the chemical contains 299 grams of copper. How many grams of zinc does it contain?
From the question, we know:
Zinc : Copper
3 : 13
We are told that : A jar of the chemical contains 299 grams of copper.
The grams of zinc it contains is:
3/13 = x/299
Cross Multiply
13 x = 3 × 299
x = 3 × 299/13
x = 897/13
x = 69 grams
It contained 69 grams of zinc
