CHEM 101 Final: CHEM 101 Drexel CHEM 101 Final Exam WINTER 08 09 with answers
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CHEM 101 WINTER 08-09 FINAL EXAM
On the answer sheet (Scantron) write you name, student ID number, and recitation section
number. Choose the best (most correct) answer for each question and enter it on your answer
sheet.
Avogadro’s Number: 6.022 × 1023 mol-1 P1V1 / n1T1 = P2V2 / n2T2
Speed of Light: c = 3.00 x 108 m s-1 PV = nRT
Planck’s Constant: h = 6.626 x 10-34 J s d = PM / RT
Rydberg Constant: R = 2.179 x 10-18 J R = 0.0821 L atm mol-1 K-1
E = hc/λ = hυ 1 atm = 760 Torr = 760 mm Hg
q = m c ∆T Specific Heat of Water = 4.184 J g-1 °C-1
1. Please chose the letter “a” as your answer for this question.
2. Which of the following is a chemical property of iron?
a. Iron conducts electricity.
b. Iron conducts heat.
c. Iron melts at 1535°C.
d. Iron can be bent into shapes.
e. Iron rusts on exposure to water and oxygen.
3. Which of the following compounds can be dissolved in water to give a solution that conducts
electricity?
a. CCl4 (carbon tetrachloride)
b. (CH3)2CHOH (isopropyl alcohol)
c. C12H22O11 (sucrose)
d. C6H14 (hexane)
e. Ba(NO3)2 (barium nitrate)
4. Which of the following is not a metal?
a. nickel (Ni, atomic number 28)
b. lithium (Li, atomic number 3)
c. phosphorus (P, atomic number 15)
d. uranium (U, atomic number 92)
e. calcium (Ca, atomic number 20)
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5. When an atom loses electrons, ____ are formed.
a. neutrons
b. nuclei
c. ions
d. protons
e. alpha particles
6. Which of the following represent a pair of isotopes?
Cl Ar O F Ar
I. II. III. IV. V.
a. I and III
b. I and II
c. I and IV
d. II and V
e. III and IV
7. An element that has 32 protons, 32 electrons, and 52 neutrons has an approximate atomic weight
of:
a. 64 amu.
b. 32 amu.
c. 52 amu.
d. 116 amu.
e. 84 amu.
8. Three elements that are likely to have similar chemical and physical properties are:
a. B, C, Si
b. H, He, Ne
c. Pb, Bi, Po
d. Cu, Ag, Au
e. Ca, Co, Cr
9. Which formula and name combination is incorrect?
a. N2O3 and dinitrogen trioxide
b. P4O10 and tetraphosphorus decaoxide
c. AsF5 and arsenic pentafluoride
d. SF6 and sulfur heptafluoride
e. SeCl4 and selenium tetrachloride
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10. What is the correct general formula for a straight-chain alkyne?
a. CnH2n
b. CnHn
c. CnH2n+2
d. CnHn+2
e. CnH2n−2
11. Find the correct combination of protons and electrons below for the magnesium ion.
a. 12 protons and 10 electrons
b. 24 protons and 22 electrons
c. 12 protons and 12 electrons
d. 12 protons and 14 electrons
e. 24 protons and 24 electrons
12. Determine the number of molecules in a drop of water that has a mass of 0.050 g.
a. 6.50 × 1026 molecules
b. 5.02 × 1021 molecules
c. 5.42 × 1023 molecules
d. 1.67 × 1021 molecules
e. 2.17 × 1026 molecules
13. Which statement regarding the complete combustion of a carbon compound is correct?
a. Carbon dioxide and water are consumed in the reaction and must be shown in the
balanced equation.
b. Heat is produced in the reaction and must be shown in the balanced equation.
c. The carbon compound is consumed in the reaction but need not be shown in the
balanced equation.
d. Balancing the equation requires knowing whether the products are gases or liquids.
e. Oxygen is consumed in the reaction and must be shown in the balanced equation.
14. For the reaction given below, how many moles of aluminum will react if 15 moles of Br2 react
and 10 moles of AlBr3 are produced?
2 Al + 3 Br2 2 AlBr3
a. 10
b. 8
c. 16
d. 4
e. 40
Document Summary
On the answer sheet (scantron) write you name, student id number, and recitation section number. Choose the best (most correct) answer for each question and enter it on your answer sheet. Speed of light: c = 3. 00 x 108 m s-1. Planck"s constant: h = 6. 626 x 10-34 j s. Pv = nrt d = pm / rt. Rydberg constant: r = 2. 179 x 10-18 j. E = hc/ = h q = m c t. 1 atm = 760 torr = 760 mm hg. Specific heat of water = 4. 184 j g-1 c-1. Please chose the letter a as your answer for this question. Which of the following is a chemical property of iron: iron conducts electricity, iron conducts heat, iron melts at 1535 c, iron can be bent into shapes, iron rusts on exposure to water and oxygen.
