Organic Chemistry
🔬 A hydrocarbon has the formula C7H14. What type of bonds does it contain, and what is its name?
One double bond, rest single bonds
Heptene
🎯 What is the shape of a molecule with 2 bonding pairs and 2 lone pairs around the central atom?
Bent
⚖️ What is the molar mass of RbI?
212 g/mol
♻️ What type of reaction is this?
2H2 + O2 --> 2H2O
Synthesis
📉 What happens to pressure when volume decreases, assuming temperature is constant?
As volume decreases, pressure increases
🧩 Draw the skeleton structure for a hydrocarbon with a triple bond and name it.
Correct skeleton and name
🔷 Draw the Lewis structure of PH3. Predict the VSEPR shape.
Trigonal pyramidal
🧮 How many atoms are in 2 moles of helium?
1.204 x 1024 atoms
🔥 Balance: CH4 + O2 → CO2 + H2O
CH4 + 2O2 → CO2 + 2H2O
📊 What gas law describes the relationship between pressure and volume?
Boyle's Law
A molecule has a nitrogen that is connected to a carbon and two hydrogens.
What functional group is it?
💡 CH3Br
Determine the number of bonding domains, lone pair domains, and the shape.
BD: 4
LP: 0
Shape: Tetrahedral
🌡️ A compound is 40% carbon, 6.7% hydrogen, and 53.3% oxygen. What’s the empirical formula?
CH2O
🔗 Classify the reaction: K + NaCl → KCl + Na
🧊 How much energy is needed to melt 10 g of ice at 0°C? (ΔHfus = 334 J/g)
3340 J
A molecule has a single carbonyl group (C=O) in it.
What two functional groups could it be? How would you tell the difference?
Ketone = Carbonyl in the middle
Aldehyde = Carbonyl on final carbon
📐 A molecule has 5 bonding domains and 0 lone pairs. Predict its 3D geometry and give an example.
PCl5
🔬 Find the percent composition of magnesium in MgSO₄.
20%
⚡ A 2 L solution contains 4 M NaCl. If you want to dilute it to 1 M, how much water do you need to add?
ADD 6L
🔥 What is the temperature of a gas if 5 moles take up 10L of space at 1.95 atm?
(R = 0.08206)
47K
Ketone Amine Amide
Ether
Name 6 of the VSEPR shapes we learned this year! No notes!
Linear Bent Trigonal planar
Trigonal pyramidal Tetrahedral
Octahedral Trigonal bipyramidal
CaCO3 --> CO2 + CaO
⚗️ If 25g of calcium carbonate reacts, how many grams of CO2 will be produced (assume complete reaction)?
11g CO2
Name 5 types of chemical reactions we talked about this year. No notes!
Synthesis Decomposition Neutralization
Single replacement double replacement
Combustion
🌡️ Calculate the total energy needed to heat 5g of ice from -10°C to 20°C.
Use 3 steps: warming ice, melting, and heating water.
Cice = 2 J/goC
ΔHfus = 334 J/g
Cwater = 4.18 J/goC
2188 J