Unit 3:Molecules
This compound has the chemical symbol CaCl2
What is calcium chloride?
This law, which states that matter is neither created nor destroyed, explains why chemical reactions need to be balanced
What is conservation of mass?
This is the molarity of a solution when 1.1 moles of solute are dissolved in 2.04 L of solvent
Units matter
What is 0.54 M?
This principle, named for a French chemist, allows us to predict what will happen when an equilibrium is stressed
What is LeChatelier's Principle
A compound that tastes sour is most likely this type of material
What is acid?
This is the formula for trisulfur octachloride
What is S3Cl8?
The unbalanced chemical reaction C2H6O + O2 --> CO2 + H2O is an example of this type of reaction
What is combustion?
What are the forward and reverse reactions?
This type of reaction usually has only one reactant and multiple products
What is decomposition?
Litmus paper turns this color when exposed to a base
What is blue?
The difference in this property of elements determines the polarity of a bond
What is electronegativity?
This is the molar mass of RbCl
Units matter
What is 120.9 g/mol?
This is the equilibrium expression for the reaction N2 + 3 H2 <--> 2 NH3
[NH3]2
[N2]*[H2]3
The missing coefficient in this chemical equation
C3H8 + 5 O2 --> 3 CO2 + ___ H2O
What is 4?
Bases have a pH value in this range
What is 7-14?
This prefix indicates there are four of an atom in a molecule
What is tetra-?
34 grams of a compound with a molar mass of 81.3 g/mol is this many moles
Units matter
What is 0.42 mol?
Calculate Keq for this reaction when [NO2]=3.02 M and [N2O4]=7.11 M
2 NO2 <--> N2O4
What is 0.78?
This many mL of a 8.2 M stock solution should be diluted to 100 mL to make a 1.3 M solution
Units matter
What is 15.9 mL?
This is the pH of a solution where the concentration of [H+] is 7.73*10-4
What is 3.11?
Hydrogen sulfide (H2S) has this molecular geometry
What is bent?
If 3.1 moles of compound A react, how many moles of compound C are produced?
2A + B --> 3 C + D
What is 4.65 mol?
When additional products are added to a system at equilibrium, the reaction shifts in this direction
What is left/towards reactants?
If you have 3 moles of compound A and 2 moles of compound B, this is the limiting reactant
2 A + 2 B --> 7C + 3D
What is B?
Acids that do not completely dissociate into hydrogen ions and anions are this type of acid
What are weak?