CHEM120 Final Exam & Answers Graded A+
1. The name of the compound FES04 is iron sulfate
2. Peptide bonds link the amino acids together to make a primary
polypeptide sequence. The bonds are AMIDE
3. If a balloon is filled with helium were heated with a blow dryer , the balloon would
increase in volume
4. You are setting up an experiment to test a pair of experimental headache
medications, X & Y . As part of the experiment setup, you take individuals suffering
from headaches and divide them into 4 groups and provide each with a different
pill. Which of the 4 groups below would you classify as the positive control? A group
given the placebo pill
5. Which of the following is not normally part of the scientific inquiry? Philosophizing
6. An isotope has a total of 46 neutrons and 22 protons. What would be the
atomic symbol of this isotope? Ti (Titanium)
7. Which of the following is the correct formula for nitride ion? N3-
8. Select all that would be classified as cations. Magnesium, Li+
9. An isotope of gallium (atomic number 31) has a mass number of 67 . How
many neutrons will this isotope have? 36
10. Select all of the following that would be classified as polar covalent compounds:
PCl3,H20
11. Select all of the following compounds that would be classified as ionic :
Sodium Chloride, Ca3N2,CaF2
12. Which of the following would you expect to form when a nickel(I) ion combines
with nitrate? NiNO3
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, 13. Calcium Phosphate, Ca3(PO4)2 is used to treat calcium deficiency . What is
the molar mass of this compound? 310.18g/mol
14. Determine the number of oxygen atoms in magnesium hydroxide: 2
15. Xenon gas reacts with fluorine gas to form xenon tetrafluoride. Identify which
image in the figure represents the reactants and which image represents the
products in the correct ratio so that mass is conserved. Option that states Image A
shows reactants and image C shows products
16 . Balance the following skeletal equation: Li(s) + H20(l)
LiOH(aq)+H2(g)
2Li(s)+2H20(l) 2LiOH(aq)+H2(g)
17. Which of the following units can be used to represent the
concentration of a solution prepared by dissolving salt in
water. Select all that apply : M(mol/liter) , % mass by volume
18. A solution of ethanol ,C2H5OH is prepared by dissolving 25.0 ml
of ethanol in enough water to give a total volume of 250.0 ml
.What is the percent by volume concentration of ethanol ? 10%
19. How many liters of 8 M NaCl solution would you need to add
to a reaction that requires 2 moles of NaCl ? 0.25 L
This study source was downloaded by 100000848900824 from CourseHero.com on 08-27-2023 06:38:27 GMT -05:00
https://www.coursehero.com/file/82582698/chem120-final-docx/
1. The name of the compound FES04 is iron sulfate
2. Peptide bonds link the amino acids together to make a primary
polypeptide sequence. The bonds are AMIDE
3. If a balloon is filled with helium were heated with a blow dryer , the balloon would
increase in volume
4. You are setting up an experiment to test a pair of experimental headache
medications, X & Y . As part of the experiment setup, you take individuals suffering
from headaches and divide them into 4 groups and provide each with a different
pill. Which of the 4 groups below would you classify as the positive control? A group
given the placebo pill
5. Which of the following is not normally part of the scientific inquiry? Philosophizing
6. An isotope has a total of 46 neutrons and 22 protons. What would be the
atomic symbol of this isotope? Ti (Titanium)
7. Which of the following is the correct formula for nitride ion? N3-
8. Select all that would be classified as cations. Magnesium, Li+
9. An isotope of gallium (atomic number 31) has a mass number of 67 . How
many neutrons will this isotope have? 36
10. Select all of the following that would be classified as polar covalent compounds:
PCl3,H20
11. Select all of the following compounds that would be classified as ionic :
Sodium Chloride, Ca3N2,CaF2
12. Which of the following would you expect to form when a nickel(I) ion combines
with nitrate? NiNO3
This study source was downloaded by 100000848900824 from CourseHero.com on 08-27-2023 06:38:27 GMT -05:00
https://www.coursehero.com/file/82582698/chem120-final-docx/
, 13. Calcium Phosphate, Ca3(PO4)2 is used to treat calcium deficiency . What is
the molar mass of this compound? 310.18g/mol
14. Determine the number of oxygen atoms in magnesium hydroxide: 2
15. Xenon gas reacts with fluorine gas to form xenon tetrafluoride. Identify which
image in the figure represents the reactants and which image represents the
products in the correct ratio so that mass is conserved. Option that states Image A
shows reactants and image C shows products
16 . Balance the following skeletal equation: Li(s) + H20(l)
LiOH(aq)+H2(g)
2Li(s)+2H20(l) 2LiOH(aq)+H2(g)
17. Which of the following units can be used to represent the
concentration of a solution prepared by dissolving salt in
water. Select all that apply : M(mol/liter) , % mass by volume
18. A solution of ethanol ,C2H5OH is prepared by dissolving 25.0 ml
of ethanol in enough water to give a total volume of 250.0 ml
.What is the percent by volume concentration of ethanol ? 10%
19. How many liters of 8 M NaCl solution would you need to add
to a reaction that requires 2 moles of NaCl ? 0.25 L
This study source was downloaded by 100000848900824 from CourseHero.com on 08-27-2023 06:38:27 GMT -05:00
https://www.coursehero.com/file/82582698/chem120-final-docx/
