Semester
1 Chemistry Final – Mr. Anastasia
DO NOT WRITE ON THIS SHEET! Pleases bubble in the best answer for each question on the SCANTRON answer sheet provided.
1.
A
group of two or more atoms held together by bonds is a(n):
a) mixture. b)
molecule. c) element. d) compound.
2.
A
substance that cannot be decomposed by chemical or physical means is a(n)
a) molecule.
b) element. c) compound. d)
mixture.
3.
The
boiling of water is considered a(n)…
a) chemical change b)
physical change
4.
Having
consistent measurements but not coming up with the expected values could be considered …
a) accuracy b)
imprecise c) precise d) improper technique
5.
This person that determined the atom was
composed primarily of empty space:
a) Thomson
b) Rutherford. c) Milliken. d) Debroglie
6.
This
person was responsible for the “oil-drop experiment”:
a) Bohr. b)
Milliken. c) Curie. d) Rutherford.
7.
If
an object has a mass of 2.4 g and a volume of 3.7 mL, what is the object’s
density?
a) 1.5 g/mL. b) 0.65 g/mL. c)
1.0 g/mL. d) 0.63 g/mL.
8.
You
would call the representative particle of sodium chloride a(n):
a) formula unit. b) atom.
c) molecule. d) arteriole.
9. How many significant figures are in the
number 1.00790?
a) 3 b)
5 c) 6 d) 2
10. Fluorine has the lowest electronegativity.
a) true b)
false
11. What is the maximum number of electrons that
can fit in the 5f sublevel?
a) 6 b)
10 c) 14 d) 2
12. How many electrons are associated with l
= 1
a) 2 b)
8 c) 6 d) 10
13.
Write the electron configuration for As?
a) [Ar] 3s24d103p3 b) [Ar] 4s24d104p3 c) [Ne] 3s22d103p3 d) [Ar] 4s23d104p3
14.
Longer wavelengths of light are lower in energy than shorter wavelengths.
a) true b)
false
15. Ionization energy is the amount of energy
required to pull an electron off an atom.
a) true b)
false
16.
What is the frequency of light emitted at 400nm? (speed of light = 3.0 x 108
m/s)
a) 7.50 x 1014 waves /sec. b) 7.50 x 105 waves /s c) 7.50 x 1011 waves/s
d) 7.50 x 1017 waves /s
17. What is the amount of energy contained in
one photon that emits light at 500nm?
a) 3.98 x 10-19J b) 5.036 x 10-25J c)
7.60 x1014J d)
5.036 x 10-16J
18. Metals in an ionic reaction tend to form
anions.
a) true b)
false
19. If the accepted value for the density of a
gas is 3.65 g/L and you experimentally determined it to be 3.05 g/L, what is
your percent error?
a) –16.4% b) 16.43% c)
83.6% d) –83.56%
20. Elements in the same period have similar
chemical properties.
a) true b)
false
21. Democritus first theorized that matter is
infinitely divisible.
a) true b)
false
22. Sulfur is a metalloid.
a) true b)
false
23. A mole of any gas at STP has a volume of
22.4 L.
a) true b)
false
24. The molar mass of Nitrogen is 14 amu’s.
a) true b)
false
25. An isotope is an atom of the same element
with a different number of protons.
a) true b)
false
26. What is the atomic mass of chlorine if its
naturally occurring isotopes have the following weights and abundances: Cl 35: mass = 34.969, abundance:
75.77%, Cl 37: mass =
36.966, abundance = 24.23%?
a) 35.0amu b)
35.453 amu c) 35.506g d)35.506 amu
27. What is the percent carbon in C2H6O?
a) 52%. b)
26%. c) 78%. d) 12%.
28. The chemical formula for aspirin is C9H8O4.
What is the mass of 0.200 mol of aspirin?
a) 22.5 g.
b) 5.4 g. c) 36.0 g. d) 45.9 g.
29. What is the volume (in liters at STP) of
2.50 mol of carbon monoxide?
a) 56.0 L.
b) 0.112 L. c) 3.10 L. d) 8.96 L.
30.
Which of the following is not an empirical formula?
a) N2H4. b) Na2SO4.
c) C6H5.
d) Sn3(PO4)4.
31.
What is the empirical formula of a compound that is 17.6% Na, 39.7% Cr, and
42.7% O?
a) NaCrO4 b)
NaCrO c) Na2CrO7 d) Na2Cr2O7
32. A compound has the empirical formula C2H3O
and a molar mass of 172 g. What is its molecular formula?
a) C8H12O4. b) C6H9O3.
c) C6H5.
d) C7H8O5.
33. The number of moles of H2
molecules in 625 L of gas at STP is:
a) 27.9 mol. b) 1250 mol. c)
1.40 x 104 mol. d) 3.58
x 10-2 mol.
34. Which is NOT a characteristic of metals?
a) brittle b) conductive c)
forms cations d) malleable
35. What is the correct formula for Strontium
Nitrate?
a) Sr2NO3. b) Sr(NO3)2. c) SrNO3. d) StNO3.
36. What is the correct formula for Aluminum
Carbonate?
a) AlCO3 b)
Al3(CO3)2 c)
Al2(CO2)3 d)
Al2(CO3)3
37. What is the correct name for PbSO4?
a) Lead Sulfate b)
Lead (II) Sulfate c) Lead (IV)
Sulfate d) Lead sulfite
38. What is the correct name for Ba3(PO4)2?
a) Barium Phosphate b)
Barium (III) Phosphate c) Barium
(II) Phosphate
d) Barium Phosphite
39. What is the mass of 52.0 cm3 of
water?
a) 52.0 kg b)
52.0 g c) 52.0 ml d) 2704.0 mg
40. What is the shape of the s orbitals?
a) circular b)
tetrahedral c) spherical d) linear
41. An atomic orbital may describe at most two electrons. What rule or principle is
this?
a) Aufbau b)
Pauli Exclusion c) Hund’s d) Heisenberg
42. The following elements are all Alkali
Metals:
a) F, Cl, Br b)
Ca, Sr, Ba c) K, Na, Li d) He, Ne, Kr
43.
How many moles are in a 100g sample of Iron (III) Oxide?
a) 2.0 mol b)
1.6 mol c) 0.625 mol d) 1.39 mol
44. What type of reaction is Pb +
ZnSO4 à PbSO4 + Zn
a) Single replacement b) Double replacement c)
Combustion
d) Combination
45.
The stoichiometric ratio of this unbalanced equation should be:
(NH4)2CO3 +
Fe(OH)3 à
Fe2(CO3)3 + NH4OH
a) 6:4 à 2:12 b) 2:4 à 2:6 c) 1:2 à 1:3 d) 3:2 à 1:6
46. The products of this reaction are? AgCl
+ (NH4)2SO4 à
a) AgSO4 +
(NH4)2Cl b) Ag2SO4 +
NH4Cl2
c) AgNH4 +
ClSO4 d) Ag2SO4 +
NH4Cl
47. What is the net ionic product of the
reaction in question # 46?
a) AgSO4 b)
Ag2SO4 c) NH4Cl d) AgNH4
48. Which gas has a density of 1.96 g/L at STP?
a) SO2 b)
CO2 c) N2 d) NO
49. What does (aq) symbolize in a
chemical equation?
a) Heat b)
Catalyst c) Change d) Solution
50. The following would be appropriate to
signify molten NaCl in a chemical equation:
a) (l) b)
(aq) c) (s) d) (g)
51. Which of the following formulas is written
incorrectly?
a) Mg3(PO4)2 b) Hg2Cl2 c) HgCl2 d) NaSO4
52. P3- would be isoelectronic with
...
a) Nitrogen b) Neon c)
Arsenic d) Argon
53. How many moles of hydrogen atoms would be in
3.5 moles of ammonium hydroxide?
a) 17.5 b)
3.5 c) 14 d) 22.4
54. What is the percent by mass of oxygen in
calcium hypochlorite?
a) 17.5% b) 29.8% c)
36.6% d) 22.4%
55. Which of the following is a molecule?
a) NaCl b)
CH4 c) FeCO3 d) AlPO4
EXTRA
CREDIT: Write the answers below
question 100 on the scantron sheet.