Final answer:
To make brass with 25 ounces of copper, you will need approximately 20.45 ounces of zinc.
Step-by-step explanation:
Brass is an alloy composed of 55% copper and 45% zinc by weight. To find out how many ounces of zinc you need to make brass with 25 ounces of copper, you can set up a ratio.
Since the ratio of copper to zinc is 55:45, you can set up the equation:
55% copper = 25 ounces
45% zinc = x ounces
Using cross multiplication, you can solve for x:
x = (45/55) * 25
x ≈ 20.45 ounces
So, you will need approximately 20.45 ounces of zinc to make brass with 25 ounces of copper.