An Erlenmeyer flask contains 300 mL of water. A sample of 15.0 g of copper metal is dropped into the flask, raising the water level to 400 mL. What is the density of the copper sample?

Explanation:

The density of a substance can be found by using the formula

From the question

mass = 15 g

volume = final volume of water - initial volume of water

volume = 400 - 300 = 100 mL

We have

We have the final answer as

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the answer is 75.0%.