High School

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You pour 35.4 mL of water into a graduated cylinder. You then place a 66.9 g sample of copper into the water, and it quickly sinks to the bottom. What is the new volume reading in the graduated cylinder?

Answer :

Final answer:

42.87 mL.

The volume of the copper sample is found by dividing the mass by the density of copper. This volume is then added to the original water volume to give a new volume reading on the graduated cylinder of 42.87 mL

Explanation:

This is a classic problem involving density, volume, and mass. The volume of a solid object is equal to its mass divided by its density. In this case, we are told the mass of the copper (66.9 g) and we know the density of copper is 8.96 g/cm3.

So, the volume of the copper sample is 66.9 g divided by 8.96 g/cm3 which equals 7.47 ml. The new volume reading on the graduated cylinder after adding the copper should be the original volume of the water (35.4 mL) plus the volume just calculated for the copper (7.47 mL). Therefore, the new volume reading on the graduate cylinder is 35.4 mL + 7.47 mL = 42.87 mL.

Learn more about Density here:

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