The mass of a 100.0 cm3 chunk of this steel is 810 grams.
What is Density?
A substance's density is defined as its mass per unit of volume. Density is most frequently represented by the symbol, however Latin letter D may also be used. Density is mathematically defined as mass divided by volume.
Density = Mass/ volume
Mass = density x volume
Mass at 100 cm3 = density x volume x 100 cm3
Mass at 100 cm3 = 8.1 g/cm x 100 cm 3
Mass at 100 cm3 = 810 grams
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