Question

An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 120 grams of an alloy that contains 42%copper with 200 grams of pure copper. Dont round

Answer 1

An alloy is a mixture composed of two or more elements, at least one of which is a metal. To find the composition of the alloy made by mixing 120 grams of an alloy containing 42% copper with 200 grams of pure copper, calculate the amount of copper in each component and add them together.

Step-by-step explanation:

An alloy is a mixture composed of two or more elements, at least one of which is a metal. It is commonly used in manufactured items because the properties of these metal mixtures are often superior to a pure metal. To find the composition of the alloy made by mixing 120 grams of an alloy containing 42% copper with 200 grams of pure copper, we need to calculate the amount of copper in each component and then add them together.

1. Amount of copper in the alloy containing 42% copper = 120 grams * 0.42 = 50.4 grams
2. Amount of copper in the pure copper = 200 grams * 1 = 200 grams
3. Total amount of copper in the alloy = 50.4 grams + 200 grams = 250.4 grams

Therefore, the resulting alloy contains 250.4 grams of copper.

Answer 2

To answer the problem above, we make use of balancing of the materials before and after mixing. Let total amount of material after mixing is 320. Let x be the percent copper of the mixture and applying copper balance,

(0.42)(120 g) + (1)(200) = 320x, x = 0.7825

Thus, the mixture is 78.25% copper.