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CHEM 120 FINAL EXAM 2025-2026|WITH QS AND CORRECT AS|100% PASS
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a digit that is either reliably known or closely estimated significant figure a relationship between two quantities expressed as a fraction conversion factor conversion of a measurement in one unit into another by the use of conversion factors dimensional analysis How many centimeters are in an inch? 2.54cm the most basic form of matter that exists under ordinary conditions
element What are the 7 diatomic elements? H2, N2, O2, F2, Cl2, Br2, I an ion with a positive charge cation an ion with a negative charge anion a polyatomic ion has to have gone through a _____ bond covalent What's the formula for percent composition? (mass of component / total mass of solution) x 100
Is volume an intensive or extensive physical property? extensive What are some common units for measuring density? g/cm3, g/ml, g/L The same thing as density just with no units specific gravity How do you name an ionic compound of a nonmetal and a group 1 or 2 metal? metal + nonmetal + ide How do you name an ionic compound of a nonmetal and a transition metal? metal + charge in roman numerals + nonmetal + ide
What's the only positive polyatomic ion? NH4+ How do you name a molecular compound of 2 nonmetals? nonmetal + nonmetal + ide and then add the greek prefix to the front of the name if there is more than one atom for the first element listed and for the second element even if there's only one List the greek prefixes from 1- mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca When balancing a chemical equation and there is H, O, and C, in what order should you balance? balance the carbons first, then the hydrogen, and the oxygens last an element or compound combining with O combustion reaction
the resistance of a liquid to flow viscosity the change from liquid to gas vaporization vaporization at the boiling point or at a higher temperature boiling vaporization at temperature lower than boiling point evaporation the change from a gas to liquid condensation
the pressure exerted by a vapor above a liquid vapor pressure the change from a solid directly to a gas sublimation the temperature at which the vapor pressure of a liquid equals the atmospheric pressure boiling point We have an expert-written solution to this problem! Who came up with the idea of the wave mechanical model of the atom (shell, subshell, orbital, etc) Bohr noted by "n", the energy level or ring around the nucleus the electron's in electron shell
Only ____ bonds can share electrons covalent/molecular What are the 3 exceptions to the octet rule? H is happy with 1 valence e-, Be wants 4, B wants 6 If there are 2 electron groups around the central atom, what's the electron geometry? linear, 180 deg If there are 3 electron groups around the central atom, what's the electron geometry? trigonal planar, 120 deg If there are 4 electron groups around the central atom, what's the electron geometry? tetrahedral, 109.5 deg
If there are 3 electron groups and 1 lone pair around the central atom, what's the molecular geometry? v shaped, approx 120 deg If there are 4 electron groups and 1 lone pair around the central atom, what's the molecular geometry? trigonal pyramidal If there are 4 electron groups and 2 lone pairs around the central atom, what's the molecular geometry? v shaped, approx 109.5 deg We have an expert-written solution to this problem! What are 3 main properties of gases? compressible, low density, always mix completely 1 atm = ____ mmHG
As intermolecular force strength increases, what happens to surface tension? also increases As intermolecular force strength increases, what happens to viscosity? also increases As intermolecular force strength increases, what happens to boiling and melting point? also increases As intermolecular force strength increases, what happens to vapor pressure? it decreases a property of a substance that depends on how much of a solute is added to it, not on what solute is added
colligative property the charge that an atom would have if all the bonded electrons were transferred to the more "electronegative" atom oxidation state
