Airbag
Smells
Biofuels
Acids
Spectroscopy
100
2 CO(g) + O₂(g) → 2 CO₂(g)
MW (g/mol): 28 32 44
0.123 mol of CO is mixed with 2.00 g of O₂.
The mass of CO2 produced is...
What is 5.41 g CO2?
Remember when solving this you must determine your limiting and excess reagent.
100
1,4-dimethoxybenzene (which gives the Lotus its smell) has what molecular formula AND bonus points for functional group.
What is C8H10O2?
100
The most viscous fatty acid. Explain.
What is Ricinoleic Acid?
Viscosity = resistance to flow = stronger IMFs. Longer hydrocarbon chain than palmitic means STRONGER LDF.
It's also capable of H-bonding more than stearic/palmitic acid. It has 2 H bond donors and not 1, not 2, but 3 H bond acceptors.
100
The titration shown above uses a [Strong/Weak] acid and a [Strong/Weak] base
What is Weak Acid and Strong Base?
Note that the pH at equivalence point is NOT 7, so it cannot be a strong acid strong base combo.
100
Using this absorbance spectrum of an unknown compound X, what color is compound X?
Red/orange/slightly jaundiced rudolph's nose
300
CH₆N₄O₃(s) → CO(g) + 2 H₂O + 2 N₂(g)
MW (g/mol): 122 28 18 28
Guanidine Nitrate is used in modern airbags!! It's less toxic than sodium azide. Disclaimer: this is a totally fake equation that Darshita made and it's actually not really balanced but let's ignore for the purpose of this question.
FYI. CO (carbon monoxide) is a colorless gas that can cause sudden illness and death. N2 is not toxic.
The atom economy is...
What is 45.9%
Note: N2 is our desired product.
Bonus Question: Would you trust your life with this airbag?
300
The compound with the most different smell.
What is cyclohexanone? (Ans. Because of its ketone group. The others all have an alcohol/OH group)
300
Caffeine has an oral LD50 in rats of 192 mg/kg. A popular energy drink contains 80 mg of caffeine per 8.0 fl oz can.
How many cans would a 70 kg rat (ok yes it is a large rat) need to consume to likely die?
What is 168 cans?
192 mg/kg × 70.0 kg = 13,440 mg
Cans needed: 13,440 mg ÷ 80.0 mg/can = 168 cans
300
In a titration, 15 mL of an unknown monoprotic acid was titrated with 0.100 M NaOH. Calculate the molarity of the unknown acid.
What is 0.133333333 M?
moles acid = moles base at eq. point.
MaVa = MbVb
Ma (0.015 L) = (0.1 M)(0.020 L)
500
Draw a constitutional or functional isomer for the Lotus molecule.
insert drawing... keep track of carbons, hydrogens, etc. that number should not change
500
Surprise! It's a polymer question
The molecular formula for this polymer's repeating unit is...
Bonus: what is the DOMINANT IMF of this polymer in an AQUEOUS SOLUTION?
What is C12H22N2O2?
H bonding.
500
You use Beer Lamberts Law to plot a solution of KMnO4 and record an absorbance of 3.00. You find that after diluting 1 mL of the sample with a 49 mL solvent, the absorbance of the solution is 0.5.
What is the concentration of KMnO4 in the original solution?
What is 0.00994 M KMnO₄?
Plug in the 0.5 Absorbance to the equation given on the calibration curve to find x, the diluted concentration. Then use M1V1=M2V2 to find the undiluted (original) concentration. The dilution factor is 50 fold.