1.With a displacement volume of 0.6657 gal Determine the density in g/cm^3 of a 15 block of aluminum.
2. The element antimony has an atomic weight of 121.757 amu and only two naturally-occurring isotopes. One isotope has an isotope mass of 120.904 amu and abundance of 57.3%. Based on these data, Calculate the mass of the other isotopes?