Karen  measures the initial volume of water as 12.5 mL.  She then adds a 2.3 gram rubber stopper and the volume rises to 20.8 mL. What is the volume of Karen's rubber stopper?

a18.5 grams
b 2.3 grams
c 20.8 ml
d 8.3 ml

20.8 - 12.5 =8.3ml

Explanation:

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