You suspect your trophy for the “Freshman Chemistry Award” of mass 122.6 g is not composed of pure gold and you decide to test this by immersing the trophy into a graduated cylinder containing a liquid shown in Fig. 2A. The result is shown in Fig. 2B. Is your trophy made of pure gold? What concept discussed in this chapter did you use to answer this problem? What additional information did you need to look up to answer the problem?