June 2019 Chemistry Regents #26-30
Highlight to reveal answers and explanations
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Questions | Answer | Links | Explanations |
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26 When an F atom becomes an F- ion, the F atom (1) gains a proton (2) loses a proton (3) gains an electron (4) loses an electron
| 3 | gains an electron...never protons | |
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27 Which substance is an Arrhenius base? (1) HNO3 (2) H2SO4 (3) Ca(OH)2 (4) CH3COOH
| 3 | Table L has the bases | |
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28 In which type of nuclear reaction do two light nuclei combine to
produce a heavier nucleus? (1) positron emission (2) gamma emission (3) fission (4) fusion
| 4 | nuclear fusion...know it | |
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| 29. Using equal masses of
reactants, which statement describes the relative amounts of energy
released during a chemical reaction and a nuclear reaction? (1) The chemical and nuclear reactions release the same amount of energy (2) The nuclear reaction releases half the amount of energy of the chemical reaction. (3) The chemical reaction releases more energy of the nuclear reaction. (4) The nuclear reaction releases more energy of the chemical reaction.
| 4 | nuclear is sooo much greater | |
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30. The ratio of the mass of U-238 to the mass of Pb-206 can be used to (1) diagnose thyroid disorders (2) diagnose kidney function (3) date geological events (4) date once-living organisms
| 3 | U-238 geological events | |
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