Ajeweler guarantees that a piece of jewelry is at least 95% gold, by mass. you consider buying a piece of gold jewelry that weighs 9.85g and has a volume of 0.675cm3. the jewelry contains only gold and silver. suspicious of the jeweler, you look up the density of gold and silver, they are 19.3g/cm3 and 10.5g/cm3, and do a quick calculation to find out the % by mass of gold. is the jeweler trying to cheat you?