Respuesta :
If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.
What is a Ratio?
A ratio expresses the number of times one number contains another. For example, if a dish of fruit contains eight oranges and six lemons, the orange-to-lemon ratio is eight to six. Similarly, the lemon to orange ratio is 6:8, while the orange to total fruit ratio is 8:14.
Given that Brass is an alloy made from copper and zinc in the ratio 3:2, based on weight. Therefore, the ratio of the metals can be written as,
Copper / Zinc = 3/2
Now, as the weight of the copper is 120grams. Therefore, the ratio can be written as,
Copper / zinc = 3/2
120 grams / zinc = 3/2
zinc = (120 grams × 2) / 3
zinc = 80 grams
Hence, If 120g of copper are needed for a certain piece of brass, then the weight of the zinc that will be needed for the same piece is 80 grams.
Learn more about Ratios here:
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