Answer the following question given this paragraph: All redox reactions occur with a simultaneous change in the oxidation numbers of some atoms. At least two elements must change their oxidation numbers. When an oxidation number of an atom is increased in the course of a redox reaction, that atom is being oxidized. When an oxidation number of an atom is decreased in the course of a redox reaction, that atom is being reduced. Thus oxidation and reduction can also be defined in terms of increasing or decreasing oxidation numbers, respectively. Saylor URL: http://www. saylor. org/books. Q: When an oxidation number of an atom is decreased in the course of a redox reaction, that atom is being what? Choices: - replaced - increased - destroyed - reduced A:
reduced
Answer the following question given this paragraph: The molarity is 0.0129 M, the molality is 0.0129 m, the mole fraction is 2.33 10 , and the solution contains 1830 ppm Na2HPO4. Mole fraction is most useful for calculating vapor pressure, because Raoult's law states that the vapor pressure of a solution containing a non-volatile solute is equal to the mole fraction of solvent times the vapor pressure of the pure solvent. The mole fraction of the solvent is just one minus the mole fraction of solute. Q: The mole fraction of the solvent is just one minus the mole fraction of what? Choices: - nutrients - solution - molecules - solute A:
solute
Q: Answer the following question given this paragraph: The male gametophyte produces flagellated sperm that must swim to the egg formed by the female gametophyte. For this reason, sexual reproduction must happen in the presence of water. Therefore, nonvascular plants tend to live in moist environments. Though the life of a nonvascular seedless plant is a cycle, this can be considered the initial step in the life cycle. Q: When flagellated sperm must swim to the egg, sexual reproduction requires the presence of what substance? Choices: - air - nitrogen - sunshine - water A:
A: water
Question: Answer the following question given this paragraph: Q: Human culture is related to evolutionary theory in the discipline of what? Choices: - astrology - psychopathology - ethnology - sociobiology A:
Answer: sociobiology
*Question*
Answer the following question given this paragraph: Snow falls when water vapor condenses as ice crystals. The air temperature is below freezing all the way to the ground, so the ice crystals remain frozen. They fall as flakes. Sleet forms when snow melts as it falls through a layer of warm air and then refreezes. It turns into small, clear ice pellets as it passes through a cold layer near the ground. Freezing rain falls as liquid water. It freezes on contact with cold surfaces near the ground. It may cover everything with a glaze of ice. If the ice is thick, its weight may break tree branches and pull down power lines. Hail is another type of frozen precipitation. Hail forms in thunderstorms when strong updrafts carry rain high into the troposphere. The rain freezes into balls of ice called hailstones. This may happen over and over again until the hailstones are as big as baseballs. Hail forms only in cumulonimbus clouds. Q: What are two types of frozen percipitation? Choices: - icycles and icebergs - rain and hail - ice and frost - snow and hail A:
**Answer**
snow and hail
(Q).
Answer the following question given this paragraph: In this chapter, we aim to understand and explain the parabolic motion of a thrown object, known as projectile motion. Motion in one direction is unrelated to motion in other perpendicular directions. Once the object has been thrown, the only acceleration is in the (up/down) direction. The (right/left) direction velocity remains unchanged. Q: What is another term for the parabolic motion of a thrown object? Choices: - newtonian motion - regular motion - simple motion - projectile motion A:
(A).
projectile motion