Conceptual Topics
Characteristic that determines the identity of an element
Atomic number / proton count
___ are formed after the loss of an electron and ___ are formed after the addition of an electron
cation; anion
Ground state electron configuration for Br
[Ar] 4s2 3d10 4p5
Arrange the following types of ions in terms of increasing size: anion, cation, neutral ion
Cation < neutral < anion
Place where all three phases are in equilibrium at the same time
Triple point
___ bonding is to the sharing of electrons as ___ bonding is to the transfer of electrons
Covalent; ionic
Chemical formula for carbonate
CO3 2-
Average molecular speed will be the greatest when the molar mass is ___ and the temperature is ___
Low; high
Select the most polar bond:
N-O, C-O, Si-Cl
Si-Cl
Molecule in the liquid state that would be expected to hydrogen bond: H2O2, CHF3, CH3NH2
H2O2 and CH3NH2
A ___ reaction transfers heat to the surroundings while a ___ reaction absorbs heat from the surroundings
Exothermic; endothermic
The mass of 52.7 mL of maple syrup if its density is 1.37 g/mL? (use correct sig figs)
72.2 g
The possible values of the magnetic quantum number, mâ„“, of a 3d electron
-2, -1, 0, 1, 2
What is the formal change on the N atom in H3CNO2?
+1
Property of a liquid that increases as the strength of intermolecular forces increases
Enthalpy of vaporization, boiling point, surface tension
A stable pure substance that cannot be separated into simpler substance by chemical means
Element
Number of moles of OH ions present in 422mL of a 1.21 molar solution of Ba(OH)2
1.02 mol
The density of CO₂ gas at 307℃ and 2.15 atm
1.99 g/L
Hybridization of the central atom in H2O
sp3
At room temperature chlorine is a gas, bromine is a liquid, and iodine is a solid. All three exist as diatomic molecules at this temperature. The intermolecular attractions in these substances increase in the order:
Cl2 < Br2 < I2
When a solution reaches the equivalence point (titration)
Moles of base = moles of acid
The molecular formula of a compound that is composed of 0.186 g C, 0.0390 g H, and 0.108 g N that has a molar mass of 129 g/mol
C615N3
The molar mass of an unknown product if a 4.07 g sample at 27 ℃ has a volume of 330 mL and a pressure of 0.79 atm
384 g/mol
The bonded-atom lone-pair arrangement and molecular shape for ClF5
Octahedral, square pyramidal
The molecule in which the intermolecular forces are dominated by dispersion forces:
N2, CH3OH, H2O, NH3
N2