Q: Answer the following question given this paragraph: The small holes in bread are formed by bubbles of carbon dioxide gas. The gas was produced by alcoholic fermentation carried out by yeast. Q: What forms the small holes found in bread? Choices: - yeast - oxygen - carbon monoxide gas - carbon dioxide gas A:
A: carbon dioxide gas

Q: Answer the following question given this paragraph: Sodium and chloride ions have equal but opposite charges. Opposite electric charges attract each other, so sodium and chloride ions cling together in a strong ionic bond. You can see this in row 2 of the Figure above . (Brackets separate the ions in the diagram to show that the ions in the compound do not actually share electrons. ) When ionic bonds hold ions together, they form an ionic compound. The compound formed from sodium and chloride ions is named sodium chloride. It is commonly called table salt. You can see an animation of sodium chloride forming at this URL: http://www. visionlearning. com/library/module_viewer. php?mid=55. Q: Sodium and chloride ions have equal but what charges? Choices: - path - positive - simple - opposite A:
A: opposite

Q: Answer the following question given this paragraph: E XA MP L E 1 7 Hydrogen gas is generated by the reaction of nitric acid and elemental iron. The gas is collected in an inverted 2.00 L container immersed in a pool of water at 22C. At the end of the collection, the partial pressure inside the container is 733 torr. How many moles of H2 gas were generated?. Q: Hydrogen gas is generated by the reaction of nitric acid and what else? Choices: - gaseous iron - martian iron - carbon - elemental iron A:
A: elemental iron

Q: Answer the following question given this paragraph: Q: What is it in bone marrow transplants that may cause a graft versus host reaction? Choices: - tumors - neutrophils - cancer - lymphocytes A:
A: lymphocytes