1. The Colby Moles
Go Moles!

2. Which of the following elements (X) would react with fluorine to give you a compound with the chemical formula XF?
A. Be
B. Ra
C. N
D. Li
E. Al

3. Which of the following elements (X) would react with fluorine to give you a compound with the chemical formula XF?
A. Be
B. Ra
C. N
D. Li
E. Al

4. Which of the following statements is true?
A. Calcium is a compound, ice is an element, and blood is a mixture.
B. Calcium is an element, ice is a compound, and blood is a mixture.
C. Calcium is an element, ice is a mixture, and blood is a compound.
D. Calcium is a mixture, ice is a compound, and blood is an element.
E. Calcium is a compound, ice is a mixture, and blood is a compound.

5. Which of the following statements is true?
A. Calcium is a compound, ice is an element, and blood is a mixture.
B. Calcium is an element, ice is a compound, and blood is a mixture.
C. Calcium is an element, ice is a mixture, and blood is a compound.
D. Calcium is a mixture, ice is a compound, and blood is an element.
E. Calcium is a compound, ice is a mixture, and blood is a compound.

6. If you are travelling in a car at a rate of 55. 0 mph for 78
If you are travelling in a car at a rate of 55.0 mph for 78.0 min, what is the distance you have travelled?
(1.00 mile = 1.61 km)
A km
B km
C. 137 km
D km
E. 115 km

7. If you are travelling in a car at a rate of 55. 0 mph for 78
If you are travelling in a car at a rate of 55.0 mph for 78.0 min, what is the distance you have travelled?
(1.00 mile = 1.61 km)
A km
B km
C. 137 km
D km
E. 115 km

8. D. neither E. more information is required to know
You want to estimate the distance between your house and school. Using your car’s beginning and ending mileage, you take a measurement each way for three days and record the data in a table (see below). Later, you look up the actual distance and determine that it is 15.6 mi. Were your measurements accurate, precise, both, or neither?
Day 1
Day 2
Day 3
From School
10.6
10.8
10.7
To School
10.9
11.0
A. accurate
B. precise
C. both
D. neither E. more information is required to know

9. D. neither E. more information is required to know
You want to estimate the distance between your house and school. Using your car’s beginning and ending mileage, you take a measurement each way for three days and record the data in a table (see below). Later, you look up the actual distance and determine that it is 15.6 mi. Were your measurements accurate, precise, both, or neither?
Day 1
Day 2
Day 3
From School
10.6
10.8
10.7
To School
10.9
11.0
A. accurate
B. precise
C. both
D. neither E. more information is required to know

10. What is the density of a wooden cube if its height is 2
What is the density of a wooden cube if its height is 2.0 cm and its mass is 3.6 g?
A g/cm3
B g/cm3
C. 0.5 g/cm3
D. 0.9 g/cm3
E. 1.8 g/cm3

11. What is the density of a wooden cube if its height is 2
What is the density of a wooden cube if its height is 2.0 cm and its mass is 3.6 g?
A g/cm3
B g/cm3
C. 0.5 g/cm3
D. 0.9 g/cm3
E. 1.8 g/cm3

12. Perform the following calculation and choose the correct answer with the correct number of significant figures.
A. 1×109
B. 1.1×109
C. 1.11×109
D ×109 E

13. Perform the following calculation and choose the correct answer with the correct number of significant figures.
A. 1×109
B. 1.1×109
C. 1.11×109
D ×109 E

14. How many protons, neutrons, and electrons are found in one atom of Fe if it has a mass number of 56?
A. 26, 30, and 26 respectively
B. 24, 30, and 24 respectively
C. 19, 19, and 18 respectively
D. 30, 26, and 26 respectively
E. 30, 26, and 28 respectively

15. How many protons, neutrons, and electrons are found in one atom of Fe if it has a mass number of 56?
A. 26, 30, and 26 respectively
B. 24, 30, and 24 respectively
C. 19, 19, and 18 respectively
D. 30, 26, and 26 respectively
E. 30, 26, and 28 respectively

16. Fill in the following table with the missing information.
Element Protons Mass Number _______
cadmium _____
gold ______
A. scandium; 112; 79
B. scandium; 96; 79
C. scandium; 112; 47
D. rhodium; 112; 79
E. rhodium; 96; 79

17. Fill in the following table with the missing information.
Element Protons Mass Number _______
cadmium _____
gold ______
A. scandium; 112; 79
B. scandium; 96; 79
C. scandium; 112; 47
D. rhodium; 112; 79
E. rhodium; 96; 79

18. Calculate the molar mass of strontium using the following information:
Isotope Isotopic Molar Mass Percent Abundance
84Sr g/mol %
86Sr g/mol %
87Sr g/mol %
88Sr g/mol %
A g/mol
B × 10–2 g/mol
C g/mol
D g/mol
E g/mol

19. Calculate the molar mass of strontium using the following information:
Isotope Isotopic Molar Mass Percent Abundance
84Sr g/mol %
86Sr g/mol %
87Sr g/mol %
88Sr g/mol %
A g/mol
B × 10–2 g/mol
C g/mol
D g/mol
E g/mol

20. Calculate the number of atoms in 4.79 kg of bismuth.
A × 1025 atoms
B × 1026 atoms
C × 1022 atoms
D × 10–25 atoms
E × 10–18 atoms

21. Calculate the number of atoms in 4.79 kg of bismuth.
A × 1025 atoms
B × 1026 atoms
C × 1022 atoms
D × 10–25 atoms
E × 10–18 atoms

22. Which of the following reactions to form ions is correct?
A. F– + e– → F
B. O2 → O2– + 2e–
C. Zn → Zn2+ + 2e–
D. H+ + H+ → H2
E. Sn + 4e– → Sn4+

23. Which of the following reactions to form ions is correct?
A. F– + e– → F
B. O2 → O2– + 2e–
C. Zn → Zn2+ + 2e–
D. H+ + H+ → H2
E. Sn + 4e– → Sn4+

24. Which of the following is the correct formula for the ionic compound comprised of magnesium and iodine?
A. MgI
B. MnI2
C. MnI
D. Mg2I
E. MgI2

25. Which of the following is the correct formula for the ionic compound comprised of magnesium and iodine?
A. MgI
B. MnI2
C. MnI
D. Mg2I
E. MgI2

26. Select the correct formula for dinitrogen pentoxide
A. 2 NO5
B. 2N 5O
C. N2(O2)5
D. N2O5
E. none of the above

27. Select the correct formula for dinitrogen pentoxide
A. 2 NO5
B. 2N 5O
C. N2(O2)5
D. N2O5
E. none of the above

28. Select the correct name for SeF6.
A. selenium hexafluoride
B. monoselenide hexafluoride
C. selenium fluoride
D. hexafluoride monoselenide
E. hexafluoroselenide

29. Select the correct name for SeF6.
A. selenium hexafluoride
B. monoselenide hexafluoride
C. selenium fluoride
D. hexafluoride monoselenide
E. hexafluoroselenide

30. Which of the following compounds is considered to be ionic?
A. CH4
B. HCl
C. CO2
D. KBr
E. SF5

31. Which of the following compounds is considered to be ionic?
A. CH4
B. HCl
C. CO2
D. KBr
E. SF5

32. Name each of the following chlorine based anions in order: Cl—, ClO—, ClO2—, ClO3—, ClO4—.
A. chlorite, chlorate, chloride, hypochlorite, perchlorate
B. chloride, hypochlorite, chlorite, chlorate, perchlorate
C. chloride, hypochlorite, chlorite, perchlorate, chlorate
D. perchlorate, chlorate, chlorite, hypochlorite, chloride
E. chlorate, chlorite, chloride, hypochlorite, perchlorate

33. Name each of the following chlorine based anions in order: Cl—, ClO—, ClO2—, ClO3—, ClO4—.
A. chlorite, chlorate, chloride, hypochlorite, perchlorate
B. chloride, hypochlorite, chlorite, chlorate, perchlorate
C. chloride, hypochlorite, chlorite, perchlorate, chlorate
D. perchlorate, chlorate, chlorite, hypochlorite, chloride
E. chlorate, chlorite, chloride, hypochlorite, perchlorate

34. Select the correct name for Na2SO4.10 H2O.
A. disodium sulfate decahydrate
B. sodium sulfate decahydrate
C. sodium persulfate hydrate
D. sodium sulfate hydrate
E. disodium monosulfate decahydrate

35. Select the correct name for Na2SO4.10 H2O.
A. disodium sulfate decahydrate
B. sodium sulfate decahydrate
C. sodium persulfate hydrate
D. sodium sulfate hydrate
E. disodium monosulfate decahydrate

36. What is the correct formula for a compound that contains tin (IV) and phosphate ions?
A. SnPO4
B. SnPO3
C. Sn(PO4)2
D. Sn3(PO3)4
E. Sn3(PO4)4

37. What is the correct formula for a compound that contains tin (IV) and phosphate ions?
A. SnPO4
B. SnPO3
C. Sn(PO4)2
D. Sn3(PO3)4
E. Sn3(PO4)4

38. Determine the molar mass of nicotine.
A. 162 g
B. 170 g
C. 447 g
D. 487 g
E. 511 g

39. Determine the molar mass of nicotine.
A. 162 g
B. 170 g
C. 447 g
D. 487 g
E. 511 g

40. Calculate the moles of oxygen in 5.249 g of Na2SO4.10 H2O
A mol
B mol
C mol
D mol
E mol

41. Calculate the moles of oxygen in 5.249 g of Na2SO4.10 H2O
A mol
B mol
C mol
D mol
E mol

42. What is the mass percentage of oxygen in ethylene glycol?
B. 20%
C. 51.6%
D. 75%
E. 16%

43. What is the mass percentage of oxygen in ethylene glycol?
B. 20%
C. 51.6%
D. 75%
E. 16%

44. A g sample of an unknown compound containing carbon, hydrogen, and oxygen is combusted in the presence of excess oxygen to produce g CO2 and g H2O. Assuming the molar mass is 242 g/mol, determine the molecular formula for the compound.
A. C28H20O8
B. C13H6O5
C. C7H5O2
D. C14H10O4
E. C3.5H2.5O

45. A g sample of an unknown compound containing carbon, hydrogen, and oxygen is combusted in the presence of excess oxygen to produce g CO2 and g H2O. Assuming the molar mass is 242 g/mol, determine the molecular formula for the compound.
A. C28H20O8
B. C13H6O5
C. C7H5O2
D. C14H10O4
E. C3.5H2.5O