A pycnometer is a glass flask with a tight fitting glass stopper that is used to obtain the volume of a liquid with high accuracy. A pycnometer has a mass of $25\mathrm{.}151$ grams when empty, and a mass of $42\mathrm{.}481$ grams when completely filled with water. The pycnometer has a mass of $49\mathrm{.}129$ when completely filled with an unknown liquid. What is the density in $\frac{g}{c}{m}^3$ of the unknown liquid? Assume the density of water is $1\mathrm{.}000\frac{g}{c}{m}^3.$