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You need to know the density o f Mg

D = Mass/Volume

Mass = Density * volume

Density= 1.74 grams per cubic centimeter

Volume = 2.5 * 3.5 * 1.5

Mass = Density * volume

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Q: What is the mass of a magnesium block that measures 2.5 cm x 3.5 cm x 1.5 cm?
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