Fuels
PE Diagrams
Molecular Polarity and IMFs
Dimensional Analysis
Stoichiometry
Solutions
100
What are the two reactants in any hydrocarbon combustion reaction?
fuel and oxygen
100
Does the following PE diagram show an exothermic or endothermic reaction? How do you know?
exothermic, PE products is lower than PE reactants
100
How do we represent IMFs when drawing them?
Use dotted lines
100
What is Avogadro's number?
6.02 x 1023
100
What is the name of the leading number in front of a chemical compound in a reaction (ex: the 2s in 2H2 + O2 --> 2H2O)?
coefficient
100
What are the two parts of every solution?
solute and solvent
200
What are the two products in any hydrocarbon combustion reaction?
CO2 and H2O
200
Which letter on the PE diagram represents the activation energy of the forward reaction?
B
200
What is the four letter acronym used to memorize molecular polarity trends?
SNAP
200
What is the gram formula mass (molar mass) of C2H4?
28 g/mol
200
What is the mole ratio between N2 and NH3 in the Haber reaction below?
N2 + 3H2 --> 2NH3
1:2
200
What is the maximum mass of sucrose that can be dissolved in 100 mL of water at 60oC?
~280 g
300
Which of the following describes the relationship between bond stability and reactivity?
a. the more stable the bond, the less reactive the compound
b. the more stable the bond, the more stable the compound
c. both a and b are correct
d. neither a nor b are correct
B
300
What PE value corresponds to the activated complex in the following diagram?
100 kJ
300
Describe the strength of the IMFs in ethane as shown below.
very weak
300
Convert 12 g of water to moles of water. Round to the nearest hundredth place.
0.67 moles
300
How many moles of ammonia (NH3) are produced when 4.2 moles of H2 react with excess N2?
N2 + 3H2 --> 2NH3
2.8 moles of NH3
300
What is the molarity of an NaCl (aq) solution when 58 g of NaCl is dissolved in a 0.5 L solution?
2 M
400
Which of the following correctly shows the relationship between bond length, bond energy, and bond strength?
a. the greater the bond length, the greater the bond energy, and the greater the bond strength
b. the greater the bond length, the lesser the bond energy, and the greater the bond strength
c. the greater the bond length, the lesser the bond energy, and the lesser the bond strength
d. none of the above
C
400
What is the heat of reaction
(DeltaH)?
-20 kJ
400
In hydrofluoric acid, HF, which side would get the delta - and which side would get the delta +
H would be
delta+ and F would be
delta-
400
Convert 3.40 moles of NaCl to grams of NaCl. Round to the nearest whole number.
197 g
400
2 NaCl → 2 Na + Cl2
How many grams of sodium chloride (NaCl) are required to make 0.32 moles of chlorine (Cl2)?
37 g NaCl
400
What is the concentration in parts per million of an AgCl(aq) solution that contains 1.2 x 10-3 grams of AgCl in 800 grams of the solution?
1.50 ppm
500
Based on the bond energies provided, list the covalent bond pairings from least stable to most stable?
C-N, C-C, C-O, C-H
500
The difference of which two letters would result in the activation energy of the reverse reaction? (ex: X - Y)
C - D
500
What is the name of the IMF in red, and what is the relative strength of this IMF?
hydrogen bonding, strong IMF
500
How many molecules of water are in 230 g of water?
7.7 x 1024 molecules
500
2 Ga2O3 → 4 Ga + 3 O2
How many grams of oxygen (O2) can be produced from 15.2 grams of gallium oxide (Ga2O3)?
3.88 g
500
If 25.0 mL of a 2.19 M solution are diluted to 72.8 mL, what is the final concentration?
0.752 M