Chemistry 110 – 02
Spring 2017
Seventh Homework
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
Finish studying Hill and McCreary Chapter 5 sections 1, 3, 4, and 5.
Begin studying Hill and McCreary Chapter 6 sections 1 - 5.
The fifth quiz will include questions from the topics below. To be prepared for the quiz, you should
be able to answer these questions using only the periodic table you received in class and the
information given. Any quiz may include questions about lab safety and procedures.
Due 8:30 am Wednesday, May 17. 10 Points.
Late homework is not accepted after the answer key is distributed on Wednesday, May 17.
1. Write the formula for each of these compounds.
a. sodium nitrate
b. potassium carbonate
d. magnesium phosphate
e. calcium cyanide
g. aluminum bromide
h. ammonia
c. ammonium sulfate
f. lithium acetate
i. calcium chlorate
2. Give the name of each of these.
a. K2SO4
d. BaCl2
c. LiOH
f. NaCH3CO2
b. Ca(HCO3)2
e. NH4Cl
3. For each of these pairs of molecules, indicate whether they are isomers or are the same
compound. (I strongly recommend you borrow the model kit from the Building 15 office or the
Tutoring Center and make these molecules to check your answer)
Cl
a.
c.
H
Cl
C
C
H
H
H
H
C
F
Cl
H
H
H
F
H
C
C
H
Cl
F
H
b.
H
C
H
H
C
H
C
F
F
C
F
F
C
C
H
C
F
4. For each molecule, use VSEPR to determine the shape of the molecule. For each molecule, draw
the shape of the molecule, give the name of the shape of the molecule. Then indicate whether it is
a polar molecule or a nonpolar molecule.
a. CO2
b. H2CO
c. CH3F
d. H2O
e. NH3
5. Draw an electron dot structure for each of the following molecules. Include all lone pairs.
Then indicate whether it is a polar molecule or a nonpolar molecule.
a. C3H6O2
b. CS2
c. C3H9N
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6. For each molecule, draw the electron dot structure. Then indicate whether it is a polar molecule
or a nonpolar molecule.
a. C3H8O
b. CH3CHO
c. C2H2
7.
For each compound, indicate whether it is a molecular compound or an ionic compound.
a. NaCl
b. H2O
c. CaF2
d. K2SO4
e. CO2
f. NH4Br
8.
Sketch what a piece of NaCl looks like at the nanoscale.
9. a. What is the atomic mass of phosphorus?
b. What is the molecular mass of C6H12O6?
10. What is the molar mass of each of these?
a. C6H12O6
b. H2SO4
c. Na2HPO4
d. Ca(OH)2
11. Show your work. What is the mass of 3.48 moles of calcium chloride?
12. Answer Hill and McCreary Chapter 5 problem 30 a & b (on page 160).
13. Answer Hill and McCreary Chapter 5 problem 32 a & b (on page 160).
14. Show your work:
a. How many moles of butane is 6.98 g of butane (C4H10)?
b. How many grams of sodium sulfate is 0.538 moles of sodium sulfate?
15. Identify the reactant(s) and the product(s) in each of these chemical equations.
a. H2S + O2  H2SO4
b. C6H12O6  CH3CH2OH + CO2
16. Write the chemical equation for each of these reactions. You do not need to balance them.
a. Magnesium hydroxide and hydrochloric acid (HCl) react to produce magnesium chloride and
water.
b. Propane (C3H8) and oxygen react to produce carbon dioxide and water.
c. Nitrogen and hydrogen react to produce ammonia.
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17. The equations in this question are modified from Microbial Metabolic Diversity – The Tip of
the Iceberg, by Dr. Ruth Ann Mikels, which states, “Each of the following equations represents a
metabolic activity carried out by various species of bacteria.”
Balance each equation.
a. N2 + H2 → NH3
b. CO2 + H2O → C6H12O6 + O2
c.. H2S + O2 → H2SO4
d. C6H12O6 → CH3CH2OH + CO2
e. CO2 + H2S → C6H12O6 + S + H2O
f. C6H12O6 → CH3CHOHCOOH
g. NH4Cl + O2 → HNO2 + HCl + H2O
(nitrogen fixation)
(photosynthesis)
(alcoholic fermentation)
(anoxygenic photosynthesis)
18. Alcoholic fermentation is C6H12O6 → CH3CH2OH + CO2
a. Write the balanced equation (see your answer to the previous question).
Interpret the balanced equation for alcoholic fermentation in terms of
b. molecules of each reactant and molecues of each product. (Nanoscale interpretation.)
c. moles of each reactant and moles of each product. (Molar interpretation.)
d. grams of each reactant and grams of each product.
19. Anoxygenic photosynthesis is CO2 + H2S → C6H12O6 + S + H2O
a. Write the balanced equation (see above).
Interpret the balanced equation for anoxygenic photosynthesis in terms of
b. molecules of each reactant and molecules of each product. (Nanoscale interpretation.)
c. moles of each reactant and moles of each product. (Molar interpretation.)
d. grams of each reactant and grams of each product.
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- "Like Attracts Like" - Emmett Williams Page 3 of 3