Answers To 2021-2022 Chem328 Non-Math Final Exam Review Questions

ChemistryWiki | RecentChanges | Preferences

Here is answers to 2021-2022 Chem328 Non-Math Final Exam Review Questions

1a) 6p+(protons), 6e- (electrons), 8n0 (neutrons)
1b)Mass number = 14
1c) Atomic number = 6
1d) atomic mass C = 12g/1mole
1e) 2nd energy level (2nd row in PT), p block, 2nd column in
1f) 2s2 2p2
1g) 4ve-

2) Decreases
3) Decreases
4) Energy level valence electron are in and # of protons in nucleus (called nuclear charge), Francium (Fr)
5) Neils Bohr
6) J.J. Thomson
7) Total number of atom and # of atoms of each type must be conserved.
8) Heat is a form of energy, Temperature - average kinetic energy of all the particles in the substance
9) centi -, base unit of mass, kilograms (kg)
10) No only quantitative observation have numbers. Quantitative observation has number in it so they can use significant figure.

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).

12) Frequency is directly proportional with Energy of light and inversely to its wavelength.

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).

14) No, all change require energy movement. Exothermic reaction releases energy to surroundings (so ΔHreactant > ΔHproduct
Endothermic reaction takes in energy from surroundings (so ΔHreactant < ΔHproduct)

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).

16a) CO2, 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

16b) CH4, Non-polar bonds LDS (C is central atom & 0LP, 4 single bonds), Tetrahedral (symmetrical) geometry, Non-polar molecule (all non-polars), LDF IMF

16c) H2O1, 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
ChemistryWiki | RecentChanges | Preferences
Edit text of this page | View other revisions
Last edited June 16, 2022 5:48 am (diff)