June 2024 Chemistry Regents #21-25
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Questions |
Answer | Links |
Explanations |
| 21. Chemical reactions are most likely to occur when
reacting particles collide with the: 1 Proper energy and proper orientation. 2 Proper first ionization energy and proper molecular symmetry. 3 Same mass and the same number of electrons. 4 Same number of valence electrons and the same number of electron shells. |
1 | For a rxn to occur, they particles need enough energy (activation energy) and to be lined up (orientation). | |
| 22. At STP, a 2.0-liter sample of nitrogen gas and a
2.0-liter sample of oxygen gas have equal: 1 Atomic masses 2 Numbers of molecules 3 Densities 4 Boiling points |
2 | Avogadro's hypothesis- gases, same conditions, equal
volumes, equal number of molecules on every Regents |
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| 23. Based on Table H, which compound has the weakest
intermolecular forces at 75°C? 1 Ethanoic acid 2 Ethanol 3 Propanone 4 Water |
3 | weakest IMF result in the highest pressure at any given temperature | |
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| 24. Which term identifies a force of attraction that
exists between molecules of water? 1 Covalent bonding 2 Hydrogen bonding 3 Ionic bonding 4 Metallic bonding |
2 | key word is between- hydrogen bonding polar covalent is in the molecule |
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| 25. Which process results in an increase in disorder? 1 The condensation of water vapor. 2 The freezing of liquid ethanol. 3 The sublimation of solid iodine. 4 The solidification of melted sodium chloride. |
3 | S L G question gases have the highest disorder only one goes right 1 L <--G 2 S <-- L 3 S-->G 4 S<----L |
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