Answer the following question given this paragraph: In this equation, the letters A and B represent the reactants that begin the reaction, and the letter C represents the product that is synthesized in the reaction. The arrow shows the direction in which the reaction occurs. Q: What term is used to describe the sequence of elementary steps that together comprise an entire chemical reaction? Choices: - source mechanism - elemental mechanism - potassium mechanism - reaction mechanism A:
reaction mechanism
Answer the following question given this paragraph: A completely bonding molecular orbital contains no nodes (regions of zero electron probability) perpendicular to the internuclear axis, whereas a completelyantibonding molecular orbital contains at least one node perpendicular to the internuclear axis. A sigma () orbital (bonding) or a sigma star (*) orbital(antibonding) is symmetrical about the internuclear axis. Hence all cross-sections perpendicular to that axis are circular. Both a pi () orbital (bonding) and a pi star (*) orbital (antibonding) possess a nodal plane that contains the nuclei, with electron density localized on both sides of the plane. The energies of the molecular orbitals versus those of the parent atomic orbitals can be shown schematically in an energy-level diagram. The electron configuration of a molecule is shown by placing the correct number of electrons in the appropriate energy-level diagram, starting with the lowest-energy orbital and obeying the Pauli principle; that is, placing only two electrons with opposite spin in each orbital. From the completed energy-level diagram, we can calculate thebond order, defined as one-half the net number of bonding electrons. In bond orders, electrons in antibonding molecular orbitals cancel electrons in bonding molecular orbitals, while electrons in nonbonding orbitals have no effect and are not counted. Bond orders of 1, 2, and 3 correspond to single, double, and triple bonds, respectively. Molecules with predicted bond orders of 0 are generally less stable than the isolated atoms and do not normally exist. Molecular orbital energy-level diagrams for diatomic molecules can be created if the electron configuration of the parent atoms is known, following a few simple rules. Most important, the number of molecular orbitals in a molecule is the same as the number of atomic orbitals that interact. The difference between bonding and antibonding molecular orbital combinations is proportional to the overlap of the parent orbitals and decreases as the energy difference between the parent atomic... Q: Atomic orbitals are populated with what subatomic particles? Choices: - protons - neurons - atoms - electrons A:
electrons
Q: Answer the following question given this paragraph: Diseases of the endocrine system are fairly common. An endocrine disease usually involves the secretion of too much or not enough hormone by an endocrine gland. This may happen because the gland develops an abnormal lump of cells called a tumor. For example, a tumor of the pituitary gland can cause secretion of too much growth hormone. If this occurs in a child, it may result in very rapid growth and unusual tallness by adulthood. This is called gigantism. Q: An endocrine disease usually involves the secretion of too much or not enough hormone by which gland? Choices: - Pituitary - Thyroid - Pancreas - endocrine A:
A: endocrine
Question: Answer the following question given this paragraph: Inertia is the tendency of an object to resist a change in its motion. The inertia of an object depends on its mass. Objects with greater mass have greater inertia. To overcome inertia, an unbalanced force must be applied to an object. Q: The tendency of an object to resist a change in its motion is called? Choices: - gravitation - magnetism - friction - inertia A:
Answer: inertia
*Question*
Answer the following question given this paragraph: Q: Name the closest living relatives of tetrapods? Choices: - shrimp - spinefishes - lumpfishes - lungfishes A:
**Answer**
lungfishes
(Question)
Answer the following question given this paragraph: Acetyl-CoA is formed from the breakdown of carbohydrates, lipids, and proteins. It is used in many biochemical pathways. Q: Acetyl-coa is formed from the breakdown of carbohydrates, lipids, and what else? Choices: - hormones - acids - hydrocarbons - proteins A:
(Answer)
proteins