Menthol is a substance commonly used in cough drops. It has a molar mass of 156.3 g/mol and is comprised of 77.4% C, 12.9% H, and 10.2% O. What is its molecular formula?

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.