Conceptual/Extra Questions
Even though Chlorine and Fluorine are both halogens, they have different electronegativities. Explain why this is true on an atomic level, and name the more electronegative atom.
Chlorine is bigger, and therefore it is more difficult to keep its negatively charged electrons attracted to the positively charged nucleus. Fluorine is more electronegative.
The technical name of the covalent compound H2O is...
dihydrogen monoxide
Is this reaction an example of double or single replacement?
AgNO3 + KBr -> AgBr + KNO3
double replacement
Name the 4 types of intermolecular forces.
dipole-dipole, dispersion, hydrogen bonding, ion-dipole
What is Avogadro's number?
6.02 x 10^23
Write the abbreviated electron configuration for Arsenic.
[Ar]4s2 3d10 4p3
Explain when to use the prefix mono- when naming a compound (must include ionic or covalent)
Covalent; for the second atom involved in the compound
What should be on the products side of a combustion reaction?
CO2 and H2O
Name 2 compounds that would only experience dispersion forces in their interactions.
Any 2 nonpolar substances
True or False: Subscripts in a formula can represent the relationship of the atoms in a formula...and then be used as conversion factors
True
Draw the Lewis Structure for N2
N triple bond N, one lone pair on each N
True or False: Polyatomic ions cannot be considered as a whole, you must consider each atom separately even if you know the overall charge.
False
Write a single replacement reaction in which your starting materials are NaCl and Br2 gas. Make sure it is balanced!
2NaCl + Br2 -> 2NaBr + Cl2
Name two compounds that would experience dipole-dipole interactions as their strongest intermolecular force.
Any two polar molecules that do not exhibit hydrogen bonding
How many atoms of hydrogen are there given .5 moles of CH4?
1.204 x 10^24
Name two ways to double check that your lewis structure is correct.
Count up your electrons, make sure each atom has an octet, make sure you have all of the atoms included, equation I showed in class
Name the compound: AgNO3
silver nitrate
What does the symbol delta indicate in a chemical reaction equation?
Heat
Name two compounds whose strongest intermolecular force would be hydrogen bonding.
any polar compounds containing an H which can bond to N, O, or F
What is the mass (in grams) of .345 mol of Sulfur?
11.06 grams
List the following elements in order of increasing ionization energy: Barium, Zinc, Phosphorus, Ruthenium
Barium, Ruthenium, Zinc, Phosphorus
Name the following compound: FeBr3
Iron (III) Bromide
Balance the following reaction: C3H7 + O2 -> CO2 + H2O
4C3H7 + 19O2 -> 12CO2 + 14H2O
Name two compounds whose strongest intermolecular force would be ion-dipole attractions.
Any ionic compound and polar compound
**correction from previous workshops! Ionic compounds by themselves do not have ion-dipole forces; generally this refers to ionic compounds dissolved in water.
6.03 x 10^22