Can you calculate specific gravity using mass?

This exercise is giving me this: Mass of Pycnometer 25.428g Mass of Pycnometer filled with water 45.021g Mass of Pycnometer filled with liquid X 42.874g What is the specific gravity of liquid X? I know how to solve for specific gravity but using density... since I do not have a volume I can’t figure out the... show more This exercise is giving me this:
Mass of Pycnometer 25.428g
Mass of Pycnometer filled with water 45.021g
Mass of Pycnometer filled with liquid X 42.874g

What is the specific gravity of liquid X?

I know how to solve for specific gravity but using density... since I do not have a volume I can’t figure out the density, so how do I use mass for specific gravity?
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