evidence suggests that originally the earth's atmosphere contained a large amont of carbon dioxide and almost no oxygen. our atmosphere is different today: it contains a large of oxygen, which is good, since we need it to breathe. what caused the atmospheric change?

Which form of relativism states that people rely on their own standards of right and wrong when making a decision?

If a straight-chain hydrocarbon is a gas at room temperature, how many carbon atoms will it have? a. 6 carbon atoms b. 12 carbon atoms c. 24 carbon atoms d. 3 carbon atoms

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?