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Title: How do you find the specific gravity of a substance? Post by: miche37 on Feb 12, 2013 The specific gravity of a substance is the ratio of the mass of a substance to the mass of an equal volume of water. What is the specific gravity of a substance whose density is 2.7 g/cm^3? 8 g/cm^3? 20 g/cm^3? What is the relationship between the numerical values of the density in the CGS system and the specific gravity of a substance?
One problem that I have is that I don't know how to find the specific gravity for each density. How do you do this? Please show all your work and explain how you do this. Title: How do you find the specific gravity of a substance? Post by: rixa85 on Feb 12, 2013 I hate the cgs system, it's more confusing than the imperial system. Using the SI system,,,
Specific gravity is the same as density, with a possible decimal multiplier. Eg, density of water is about 1000 kg/m³ (actually 998). So the density of, for example, Al is 2700 kg/m³, so the SG is 2.7 (2700/1000) Density of Fe is 7870 kg/m³, so SG is 7.87 So all you need is the density of water in whatever system you want to use, and divide the density by that to get SG. |