Editing Answers To 2021-2022 Chem328 Non-Math Final Exam Review Questions
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Here is answers to [[2021-2022 Chem328 Non-Math Final Exam Review Questions]] <br> <br> 1a) 6p<sup>+</sup>(protons), 6e<sup>-</sup> (electrons), 8n<sup>0</sup> (neutrons)<br> 1b)Mass number = 14<br> 1c) Atomic number = 6<br> 1d) atomic mass C = 12g/1mole<br> 1e) 2nd energy level (2nd row in PT), p block, 2nd column in<br> 1f) 2s<sup>2</sup> 2p<sup>2</sup><br> 1g) 4ve<sup>-</sup><br> <br> 2) Decreases<br> 3) Decreases<br> 4) Energy level valence electron are in and # of protons in nucleus (called nuclear charge), Francium (Fr)<br> 5) Neils Bohr<br> 6) J.J. Thomson<br> 7) Total number of atom and # of atoms of each type must be conserved.<br> 8) Heat is a form of energy, Temperature - average kinetic energy of all the particles in the substance<br> 9) centi -, base unit of mass, kilograms (kg)<br> 10) No only quantitative observation have numbers. Quantitative observation has number in it so they can use significant figure. <br> <br> 11) Accuracy is how close you come to a desire outcome. Precision deals with the mechanics/process to act (in other words need to do things the same way over a over again to precise).<br> <br> 12) Frequency is directly proportional with Energy of light and inversely to its wavelength.<br> <br> 13)Effective collision require activation energy (minimum amount energy for a set of reactant form products) and correct spatial orientation (need to collide in a specific way).<br> <br> 14) No, all change require energy movement. Exothermic reaction releases energy to surroundings (so ΔH<sub>reactant</sub> > ΔH<sub>product</sub><br> Endothermic reaction takes in energy from surroundings (so ΔH<sub>reactant</sub> < ΔH<sub>product</sub>)<br> <br> 15) Kintic Molecular Theory (KMT) say that All substances are composed of particles (base units) that are in constant motion and sometime collide/interact. The different type of base particles are atoms (for elements), molecules (for molecular compounds, and formula units (for ionic compounds).<br> <br> 16a) CO<sub>2</sub>, Polar bonds (C+-->O), LDS (C is central atom & 0LP, 2 double bonds), Linear geometry, Non-polar molecule (polar bonds cancel out due to symmetrical geometry), London Dispersion Forces (LDF) IMF<br> <br> 16b) CH<sub>4</sub>, Non-polar bonds LDS (C is central atom & 0LP, 4 single bonds), Tetrahedral (symmetrical) geometry, Non-polar molecule (all non-polars), LDF IMF<br> <br> 16c) H<sub>2</sub>O<sub>1</sub>, Polar bond (H+-->O), LDS (O is central atom & 2LP, 2 single bonds), Bent (not symmetrical) geometry, Polar molecule (polar bonds do not cancel out, geometry not symmetrical), Hydrogen bonding IMF
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