Answer the following question given this paragraph: The way in which a reaction is written influences the value of the enthalpy change for the reaction. Many reactions are reversible, meaning that the product(s) of the reaction are capable of combining and reforming the reactant(s). If a reaction is written in the reverse direction, the sign of the changes. For example, we can write an equation for the reaction of calcium oxide with carbon dioxide to form calcium carbonate. Q: The reaction of calcium oxide with carbon dioxide forms what? Choices: - nitrogen carbonate - carbon monoxide - nitrogen - calcium carbonate A:
calcium carbonate
Answer the following question given this paragraph: Internal Energy U We can think about the internal energy of a system in two different but consistent ways. The first is the atomic and molecular view, which examines the system on the atomic and molecular scale. The internal energy U of a system is the sum of the kinetic and potential energies of its atoms and molecules. Recall that kinetic plus potential energy is called mechanical energy. Thus internal energy is the sum of atomic and molecular mechanical energy. Because it is impossible to keep track of all individual atoms and molecules, we must deal with averages and distributions. A second way to view the internal energy of a system is in terms of its macroscopic characteristics, which are very similar to atomic and molecular average values. Macroscopically, we define the change in internal energy. Q: What type of energy of a system is the sum of the kinetic and potential energies of its atoms and molecules? Choices: - external energy u - primary energy u - deep energy u - internal energy u A:
internal energy u
Q: Answer the following question given this paragraph: The trachea , or wind pipe, is a long tube that leads down to the chest. Q: What's the other term for your wind pipe? Choices: - cornea - cochlea - esophagus - trachea A:
A: trachea
Question: Answer the following question given this paragraph: Q: Urea and carbon dioxide are molecules with how many carbon atoms? Choices: - even number - four - two - one A:
Answer: one
*Question*
Answer the following question given this paragraph: Since the early 1990s, astronomers have discovered other solar systems. A solar system has one or more planets orbiting one or more stars. We call these planets "extrasolar planets," or exoplanets . They are called exoplanets because they orbit a star other than the Sun. As of April 2014, more than 4,600 exoplanets have been found, with 1706 confirmed. The rate of discovery is increasing rapidly! You can check out how many we have found at http://planetquest. jpl. nasa. gov/ . Q: What do you call a system that has one or more planets orbiting one or more stars? Choices: - galaxy - atom - molecular system - solar system A:
**Answer**
solar system
Q: Answer the following question given this paragraph: Amphibian larvae go through metamorphosis to change into the adult form. Q: Amphibian larvae go through what process to change into the adult form? Choices: - morphing - parthenogenesis - merging - metamorphosis A:
A: metamorphosis