A mixture of Oxygen gas can be prepared by heating potassium chlorate according to the following equation: 2KClO3(s)2KCl(s) + 3O2(g) The product gas, O2, is collected over water at a temperature of 25 °C and a pressure of 752 mm Hg. If the wet O2 gas formed occupies a volume of 8.72 L, the number of grams of O2 formed is g. The vapor pressure of water is 23.8 mm Hg at 25 °C. Submit AnswerRetry Entire Group krypton and carbon dioxide gases, at a total pressure of 942 mm Hg, contains 19.3 grams of krypton and 11.2 grams of carbon dioxide. What is the partial pressure of each gas in the mixture? PKr = mm Hg PCO2 = mm Hg Submit Answer

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.