This assignment will be worth 25 points added to your exam 1 score to a maximum of 110 points. You
can use your textbook, lab manual, and D2L site as resources. Please do not use Chegg or other outside
resources to answer your help provide answers.
1. Provide, in your own words, the definition of a compound unit. Give an example of a compound
unit. Give an example of a mathematic expression that can be used to simply your compound
unit into a single unit. (1 points)
2. Write a dosage problem for yourself that contains all of the following:
a. A dosage described using a compound unit that contains 3 or more units.
b. A drug delivery method (for example a pill or a drug solution) that is described as an
amount of drug per amount of substance.
c. At least one metric conversion.
Then provide an answer for your dosage problem, and show your work. You can either make up a drug
or, if you prefer, you can look up the appropriate dosage for a real drug, and use that as the starting
point for your question. (4 pts)
Exam 1 Supplement: Spring 2024
Name:_________________
3. Esters are frequently used as flavorings and/or in perfumes because they usually have a distinct
smell. Butyl 2-methylpropanoate has a sweet, fruity aroma. According to one source I found,
when present in a 2.00 wt% (weight percent) solution the odor is described as “sweet, tuti frutti,
green, melon, banana, citrus with a light cheesy nuance”. Answer the following questions about
a 2.00 wt% solution of butyl 2-methylpropanoate.
a. What is the structure of 2-methylpropanoate? (2 pts)
b. If a perfume bottle contains 70.0 mL of perfume with a density of 0.754 g/mL, and is
2.00 wt% butyl 2-methylpropanoate, what mass of butyl 2-methylpropanoate is
contained in the bottle? (3 pts)
c. How many moles of 2-methylpropanoate are contained in the bottle? (2 pts)
d. How many total oxygen atoms from 2-methylpropanoate are contained in the bottle? (2
pts)
Exam 1 Supplement: Spring 2024
Name:_________________
4. Write the formula for the following compounds. Some of these compounds contain polyatomic
ions we have not discussed in class. You may look up the formula for them if needed. (2 points)
a. Potassium oxalate
b. cobalt(II) citrate
c. magnesium phosphide
d. magnesium phosphate
Exam 1 Supplement: Spring 2024
Name:_________________
5. Provide a balanced chemical equation, including states of matter, for a reaction between
aqueous solutions of zinc(II) nitrate and potassium cyanide. You can use the expanded solubility
table below to help identify appropriate states of matter. (4 pts)
a. For poisonous chemicals, the LD50 (lethal dose, 50%) is defined as the dose that will kill
50% of test subjects, and it is used to represent toxicity. Compounds with lower LD50
values are more toxic. Both potassium cyanide and zinc(II) cyanide are very toxic due to
the cyanide anion. However, potassium cyanide has an LD50 of around 4 mg/kg while
zinc(II) cyanide has an LD50 of around 50 mg/kg. Based on the information in your
chemical equation, what do you think best explains this discrepancy in toxicity?
Exam 1 Supplement: Spring 2024
Name:_________________
6. Blutigen, a new group 5A element has been synthesized with symbol Bg and atomic number
179. Answer the following questions. (5 pts)
a. If the synthetic isotope has 333 neutrons, provide symbolic (or isotopic) notation for
blutigen AND Blutide.
b. Provide the Lewis structure for diblutigen difluoride. Assume blutigen is not hypervalent
(we haven’t done any hypervalent lewis structures in this class).
c. What is the electronic geometry and molecular shape of the blutigen (pick either atom).
