Answer the following question given this paragraph: Unlike oxygen, carbon dioxide is more concentrated in the blood in the capillaries surrounding the alveoli than it is in the air inside the alveoli. Therefore, carbon dioxide diffuses in the opposite direction. It moves out of the blood and into the air. Q: Which gas moves from the blood in the capillaries into the air? Choices: - nitrogen - carbon monoxide - oxygen - carbon dioxide A:
carbon dioxide
Answer the following question given this paragraph: Sodium and chloride ions have equal but opposite charges. Opposites attract, so sodium and chloride ions attract each other. They cling together in a strong ionic bond. You can see this in row 2 of Figure above . Brackets separate the ions in the diagram to show that the ions in the compound do not share electrons. You can see animations of sodium chloride forming at these URLs:. Q: Why do sodium and chloride ions attract each other? Choices: - sulfides attract - magnetism - like attracts like - opposites attract A:
opposites attract
Q: Answer the following question given this paragraph: You don't have to be a musician to know that playing a wind instrument like the trumpet takes a lot of air. Having healthy lungs is necessary to play a trumpet or other wind instrument. The lungs are part of the respiratory system. Q: What is necessary in a person who wishes to play wind instruments? Choices: - strong hands - vocal cords - powerful lips - healthy lungs A:
A: healthy lungs
Question: Answer the following question given this paragraph: Visible Light The range of photon energies for visible light from red to violet is 1.63 to 3.26 eV, respectively (left for this chapter's Problems and Exercises to verify). These energies are on the order of those between outer electron shells in atoms and molecules. This means that these photons can be absorbed by atoms and molecules. A single photon can actually stimulate the retina, for example, by altering a receptor molecule that then triggers a nerve impulse. Photons can be absorbed or emitted only by atoms and molecules that have precisely the correct quantized energy step to do so. For example, if a red photon of frequency f encounters a molecule that has an energy step,. Q: What kind of light ranges from red to violet? Choices: - infrared light - x rays - ultraviolet light - visible light A:
Answer: visible light
*Question*
Answer the following question given this paragraph: Elemental bromine gas can be generated by reacting sodium bromide with elemental chlorine. The other product is sodium chloride. Write a balanced chemical equation for this reaction. Saylor URL: http://www. saylor. org/books. Q: What gas can be generated by reacting sodium bromide with elemental chlorine? Choices: - Molecular Bromine Gas - photons bromine gas - gaseous bromine gas - elemental bromine gas A:
**Answer**
elemental bromine gas
Q: Answer the following question given this paragraph: The wind belts have names. The Trade Winds are nearest the Equator. The next belt is the westerlies. Finally are the polar easterlies. The names are the same in both hemispheres. Q: What is the name of the wind belt nearest the equator? Choices: - tropical gusts - cyclones - doldrums - trade winds A:
A: trade winds