Chem 103 Lab Exam 3 Questions & Answers 100% Verified!!

Chem 103 Lab Exam 3 Questions & Answers Oxygen, O2 - ANSWERis a colorless, odorless gas that supports combustion. A glowing splint will brighten or burst into flame when thrust into the conatiner. Hydrogen, H2 - ANSWERis a colorless, odorless gas that burns in air. It is less dense than air and can be captured in an inverted vessel. A confined mixture of this and air (in an inverted test tube) will ignite with a "pop" when exposed to a flame. By contrast, pure __ will burn quietly with a blue flame if it replaces natural gas in a laboratory burner. Sulfur Dioxide, SO2 - ANSWERis a colorless gas that forms when sulfur burns in air. This gas is toxic since it can combine with water to form an acidic solution called sulfurous acid, H2SO3 (aq). In small quantities, it is safely used as a preservative for dried fruit. It is in the atmosphere, formed in the combustion of coal and oil, is a principal cause of acid rain. Nitrogen Dioxide, NO2 - ANSWERis a red-brown gas with heavy, burning odor. It is toxic, causing edema of lung tissue. It and other oxides of nitrogen are significant air pollutants and can contribute to the formation of acid rain. 100% Verified!!