How is #"specific gravity"# defined? Chemistry Measurement Density 1 Answer anor277 May 20, 2017 #"Specific gravity"=rho_"substance"/rho_"reference substance"# Explanation: And the #"reference substance"# is typically water, for which under standard conditions, #rho_"water"=1*g*mL^-1#, or #1*g*cm^-3#. And thus the product #rho_"water"xx"specific gravity"=rho_"substance"# #=# #0.67*g*cm^-3#. Answer link Related questions How can density be used to identify substances? How can you find mass from density? How are density mass and volume related? How do you calculate mass using density and volume? How do you convert mass to density? How do you determine the density of a gas? What is the density of water? What is linear mass density? Why does density change with temperature? How does density affect ocean currents? See all questions in Density Impact of this question 1526 views around the world You can reuse this answer Creative Commons License