Karen and nbsp; measures the initial volume of water as 12.5ml and nbsp; she then adds a 2.3 gram rubber stopper and the volume rises to 20.8mL. What is the volume of Karen rubber stopper?

8.3mL

Explanation:

According to the question, the initial volume of a measured amount of water is 12.5mL. Karen then adds a rubber stopper that weighs 2.3grams. This increases the volume of the water.

The increase in the volume of the water is attributed to the rubber stopper. Hence, to calculate the volume of the rubber stopper, we subtract the initial volume of the water from the final volume. i.e.

Volume of added rubber stopper = final volume of water - initial volume of water

= 20.8 - 12.5

= 8.3mL

Hence, the volume of the rubber stopper is 8.3mL

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