I have chemistry homework please someone help!!!!!!!?

Q 1
A 68-g bar of gold is cut into 3 equal pieces. How does the density of each piece compare to the density of the original bar?

A plastic ball with a volume of 19.7 cm(cubed) has a mass of 15.8g. Would this ball sink or float in a container of gasoline?

Please help me! i would be so grateful if you were to give me a decent answer thanks(:

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