Barrons SAT Subject Test Chemistry, 13th Edition

21% oxygen Studies of air samples show that up to 55 miles above sea level the composition of the atmosphere is substantially th ...

Figure 15. Composition of Earth’s Crust The composition of air varies slightly from place to place because air is a mixture of g ...

Figure 16. A Possible Laboratory Preparation of Oxygen TIP A catalyst speeds up the rate of reaction by lowering the activation ...

TIP Graphic representation of how a catalyst lowers the required acti-vation energy PROPERTIES OF OXYGEN. Oxygen is a gas under ...

is a widely used commercial method, as well as a laboratory method. Another method of producing hydrogen is to displace it from ...

Zn + dil. H 2 SO 4 → H 2 (g) + ZnSO 4 This equation shows the usual laboratory method of preparing hydrogen. Mossy zinc is used ...

Figure 19. Diffusion of Hydrogen Here the H 2 in the beaker that is placed over the porous cup diffuses faster through the cup t ...

level air pressure is known as normal atmospheric pressure, also called standard pressure. The instrument most commonly used for ...

Unit Abbreviation Unit Equivalent to 1 atm Atmosphere atm 1 atm Millimeters of Hg mm Hg 760 mm Hg Torr torr 760 torr Pascal Pa 1 ...

TIP Know these basic assumptions of the Kinetic-Molecular Theory. Kinetic-Molecular Theory By indirect observations, the Kinetic ...

Some Particular Properties of Gases As the temperature of a gas is increased, its kinetic energy is increased, thereby increasin ...

Effusion is the term used to describe the passage of a gas through a tiny orifice into an evacuated chamber. The rate of effusio ...

conditions of temperature and pressure (abbreviated as STP). The standard pressure is defined as the height of mercury that can ...

Plots of V versus T for representative gases. Graphic relationship—Charles’s Law. The dashed lines represent extrapolation of th ...

STP = standard temperature of 273 K standard pressure of 760 mm Hg or 1 atmosphere (atm) or 101.3 kilopascals. Or you can use th ...

P 1 V 1 = P 2 V 2 at a constant temperature or PV = k Graphic relationship—Boyle’s Law TIP Volume vs. pressure for a gas at cons ...

Another Example The gas in a balloon has a volume of 7.5 L at 100. kPa. The balloon is released into the atmosphere, and the gas ...

(273 K), the volume should decrease; this fraction must be. So Or you can use the formula: Another Example The volume of a gas i ...

Type Problem A steel tank contains a gas at 27°C and a pressure of 12.0 atms. Determine the gas pressure when the tank is heated ...

Dalton’s Law of Partial Pressures When a Gas Is Made Up of a Mixture of Different Gases, the Total Pressure of the Mixture Is Eq ...