A3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. determine the concentration, in parts per million, of the hydrogen cyanide in this sample.

Calculate the number of moles of ethane in 100 grams

An excess of lithium oxide undergoes a synthesis reaction with water to produce lithium hydroxide li2o+h2o→2lioh if 1.05 g of water reacted, what is the theoretical yield of lithium hydroxide? a) 5.83 x 10–2 g lioh b) 1.17 x 10–1 g lioh c) 2.79 x 100 g lioh d) 1.40 x 100 g lioh

Draw the lewis dot structure for each of the following polyatomic ions