Question

In a certain​ chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 390 grams of copper. How many grams of zinc does it​ contain?

A. 104 grams
B. 1040 grams
C. 585 grams
D. 150 grams

Answer 1

To determine the amount of zinc in a jar when the zinc to copper ratio is 4 to 15 and there are 390 grams of copper, set up a proportion. The calculation reveals that there are 104 grams of zinc, matching option A.

Step-by-step explanation:

To find out how many grams of zinc are contained in a jar of a certain chemical when the ratio of zinc to copper is 4 to 15 and there are 390 grams of copper, we can set up a proportion based on the given ratio:

• Zinc : Copper = 4 : 15
• Zinc : 390 grams = 4 : 15

Let x be the amount of zinc in grams. The proportion can be written as:

x / 390 = 4 / 15

By solving for x, we get:

x = (4 / 15) × 390

x = 104 grams

Therefore, the jar contains 104 grams of zinc, which corresponds to option A.