Exam

Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
 
1)  Which measurement is consistent with a graduated cylinder which has an uncertainty of 0.1 mL? 1) ______
  A)  21.1 mL
  B)  21.140 mL
  C)  21 mL
  D)  21.14 mL

2)  The number 3009.1 expressed in scientific notation to the correct number of significant figures becomes ________. 2) ______
  A)  3.0091 x 10−3
  B)  3.0091 x 103
  C)  3.01 x 103
  D)  3.009 x 104

3)  According to dimensional analysis, which of the following is the correct set-up for the problem, "How many milligrams are there in 67 kilograms?" 3) ______
  A) 
  B) 
  C) 
  D) 

4)  A certain infant analgesic medicine has a single dose of 36.0 mg/kg of body weight. How much analgesic will be administered in a single dose for an 18.4 pound toddler? 4) ______
  A)  80.1 mg
  B)  921,000 mg
  C)  436 mg
  D)  300. mg

5)  Which of the following is not a pure substance? 5) ______
  A)  sodium bicarbonate
  B)  distilled water
  C)  calcium
  D)  blood

6)  What are the number of protons, neutrons, and electrons in 6) ______
  A)  9 protons, 9 neutrons, and 10 electrons
  B)  19 protons, 19 neutrons, and 19 electrons
  C)  9 protons, 9 neutrons, and 19 electrons
  D)  9 protons, 10 neutrons, and 9 electrons

7)  Mercury-202 has how many neutrons in its nucleus? 7) ______
  A)  102
  B)  202
  C) 
122
  D)  22

8)  A(n) ________ results from a transfer of one or more electrons from one atom or molecule to another. 8) ______
  A)  ionic bond
  B)  nonpolar bond
  C)  molecular bond
  D)  covalent bond

9)  In which of the following pairings is the formula not consistent with the ions shown? 9) ______
  A)  Na3P (Na+ and P3−)
  B)  BaF2 (Ba2+ and F)
  C)  Co2S3 (Co3+ and S2-)
  D)  K2O (K+ and O)

10)  The correct name for the ionic compound SnS2 is ________. 10) ______
  A)  tin(IV) sulfide
  B)  sodium sulfide
  C)  tin(II) sulfide
  D)  selenium sulfide

11)  The atomic orbital depicted below would be found in a ________ subshell.

11) ______
  A)  5d
  B)  4f
  C)  3p
  D)  2s

12)  Which of the following is a period 2 alkaline earth metal? 12) ______
  A)  Li
  B)  Be
  C)  Ca
  D)  P

13)  Which of the following compounds has the largest formula mass? 13) ______
  A)  CCl4
  B)  HCN
  C)  NO2
  D)  BF3

14)  Calculate the percentage composition of oxygen in Ca(C2H3O2)2. 14) ______
  A)  46.39%
  B)  29.74%
  C)  18.51%
  D)  40.46%

15)  A 2.00 g sample of cholesterol contains 1.68 g C, 0.24 g H, and 0.080 g O. What is the percent composition of C in cholesterol? 15) ______
  A)  91%
  B)  56%
  C)  84%
  D)  76%

16)  When the equation C8H18 + O2 CO2 + H2O is correctly balanced, the coefficient in front of O2 is ________. 16) ______
  A)  16
  B)  12
  C)  18
  D)  25

17) 
Given:2 Na + O2 Na2O2Calculate the moles of sodium peroxide (Na2O2) produced if
32.5 g of sodium reacts with excess oxygen.
17) ______
  A)  55.1 mol
  B) 
0.354 mol
  C)  27.6 mol
  D) 
0.707 mol

18)  Tin metal is reacted with hydrochloric acid according to the following equation. If 0.240 moles of Sn is reacted with 0.320 mol of HCl, calculate the mass of hydrogen gas liberated.
Sn + 2 HCl H2 + SnCl2
18) ______
  A)  1.31 g
  B)  0.323 g
  C)  0.485 g
  D)  2.79 g

19)  Liquids are characterized as having ________ volume which means they are ________. 19) ______
  A)  indefinite, incompressible
  B)  definite, incompressible
  C)  indefinite, compressible
  D)  definite, compressible

20)  A solution is made by dissolving 2.68 mole of KF in enough water to give a final volume of 1030 mL. What is the molarity of the solution? 20) ______
  A)  2.60 M
  B)  1.52 M
  C)  0.125 M
  D)  0.800 M