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 6.18 g of He, 14.9 g of Ne, and 34.9 g of Kr in a piston-cylinder assembly at STP. Calculate the partial pressure of each gas.
How many grams of phosphorus react with 35.8 L of O2 at STP to form tetraphosphorus decaoxide?
P4(s) + 5 O2(g) --------P4O10(s)