Molar Mass
What are the units for molar mass?
g/mol
True or False: When solving Mole Conversions, the molar mass is NEEDED in order to solve.
TRUE.
If molar mass is not given to you, it must be solved for, in order to go from one unit to another.
What is the first thing you should be working on in the beginning of class?
BELLWORK
In the problem below, what are you solving for? (include unit and substance)
How many moles of hydrogen, H2, are needed to react with 3.0 moles of nitrogen, N2?
moles of Hydrogen (H2)
Covalent Compounds are made up of TWO: metals, nonmetals, or metalloids
nonmetals
Molar Mass, is the amount of mass in grams of a substance for every ____ mole of that substance.
(What number goes in the blank?)
ONE (1)
molar mass = the amount of mass in grams per every 1 mole
How many moles are in 64.8 grams of O2? (Molar Mass of O2 = 31.998 g/mol)
2.025 mol
True or False: Unit 8 assignments can still be turned in during Unit 9?
FALSE.
Get those missing assignments turned in!!!
In the problem below, what do you know? (include units and what the substance is)
How many moles of hydrogen, H2, are needed to react with 3.0 moles of nitrogen, N2?
3.0 moles of Nitrogen (N2)
When bonding, Ionic compounds _______ electrons.
(share or transfer)
transfer
What is the molar mass of CH3? (don't forget to include your unit)
15.035 g/mol
How many grams are in 0.73 moles of CaCO3? (Molar mass of CaCO3 = 100.086)
73.063 grams
When ICE MELTS, is that a physical or chemical change?
Physical Change
True or False: A chemical reaction DOES NOT need to be balanced in order to do mole-to-mole conversions.
False. Chemical reactions must be balanced!
What type of compounds can include a polyatomic ion?
(Covalent or Ionic)
Ionic Compounds
What is the molar mass of Al2S3 ? (don't forget to include your unit)
150.144 g/mol
How many grams are in 3.3 moles of H2O?
59.45 grams
CEREAL is an example of a homogeneous or heterogeneous mixture?
Heterogeneous Mixture
N2 + 3H2 --> 2NH3
How many moles of nitrogen (N2) are needed to react with 12.0 moles of hydrogen (H2)?
4.0 mol N2
Name the following covalent compound: N3Br
trinitrogen monobromide
What is the molar mass of Ag3(NO2)2? (don't forget to include your unit)
415.72 g/mol
How many moles are in 25.0 grams of Zn(NO3)2?
0.132 moles
Absolute Zero = 0 ___
What's the unit? (Celcius, Farenheit, or Kelvin)
Kelvin
C3H8 + 5O2 --> 3CO2 + 4H2O
How many moles of oxygen (O2) are needed to react with 2.0 moles of propane (C3H8)?
10.0 mol C3H8
Write the formula for the following Ionic Compound: iron (III) oxide
Fe2O3