When a bracelet weighing 383 g in air is submerged in water, a scale measures a weight of 349 g. What is the density of the bracelet? Is the bracelet made of pure gold or something else? Explain. (Use 1.00 g/cm as the density of water and 19.3 g/cm as the density of pure gold.)

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.