Calculate the number of moles in 510.0 g of al2s3

What’s the theoretical yield of solid lead

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

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.