small piece of metal with a mass of 345.9 g wehen submereged in a beaker containing water, the water level rises to 175.5 ml. if the density of the metal block is 6.25 g/cm3 at 22 C then what ws the original water level in the beaker

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.