In addition to the information at the end of the exam, you will be given a periodic table.
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1 In addition to the information at the end of the exam, you will be given a periodic table. 1. Express 3143 in scientific notation. a x 10-3 b x c x d x Express in scientific notation. a. 919 x 10-4 b x 10-4 c x 10 4 d What is x expressed in scientific notation? a x 10 5 b x 10 6 c x 10 4 d. 1.6 x Which quantity expresses the sum of the given masses to the correct number of significant figures? 22.1 g g g a g b g c g d g 5. Given: (52.6 cm)(1.214 cm) What is the product expressed to the correct number of significant figures? a cm 2 b cm 2 c cm 2 d. 64 cm 2 6. Using the rules of significant figures, calculate the following: +3-3 (1.1 x 10 )(9.14 x 10 ) x 10 a x b x c. 1.8 x d. 1.8 x Using the rules of significant figures, calculate the following (assume that 1 in the numerator is an exact number): (6.5 x 10 )(1.111 x 10 ) a. 1.7 x b. 7.2 x c x 10 3 d. 1.4 x What is the result of the following multiplication expressed in scientific notation to the correct number of significant figures? (2.9 x 10 )(4.1 x 10 ) (4.8 x 10 )(2.12 x 10 ) a. 1.2 x b x 10 3 c. 5.3 x d. 1.2 x Which measurement contains a total of three significant figures? a g b g c g d g 10. The number rounded to three significant figures is. a b c d How many significant figures are in the number ? a. 2 b. 4 c. 5 d. 6 Page 1 of 7
2 12. Convert 3.00 kg to milligrams. a b c x 10 6 d x How many liters are in 7.4 ml? a b. 7.4 x 10 3 c. 74 d Convert 396 ml into gallons (1 L = qt and 4 qt = 1 gal). a gal b. 105 gal c gal d x 10 5 gal 15. Convert 25.0 km to miles (1 mi = 1760 yd and 1 m = yd). a x 10-2 b c x 10-5 d Convert lb to kilograms (2.205 lb = 1 kg). a b c d What is the atomic weight of nickel? a. 28 b c d What is the molecular weight of H 2 SO 4? a b c d What is the mass in grams of 1 mole of Cl 2? a b x c d What is the total number of moles contained in 115 grams of C 2 H 5 OH? a b c d What is the total number of atoms in 2.00 moles of copper? (Avogadro s number = 6.02 x ) a. 29 b x c x d What is the total mass of 3.01 x atoms of helium gas? a g b g c g d g K equals (T K = T C + 273). a. 573 C b. 27 C c. 27 C d. 573 C 24. The volume of a box is actually L. A student makes several measurements to determine the volume of the box. Which of the following measurements listed below is most accurate? a L b L c L d L 25. Which of the following is an example of a compound? a. NH 3 b. Na c. O 2 d. Ar 26. Given the following species, which is not the formula for an element? a. CO b. C 60 c. Ag d. C 27. Which material is a mixture? a. magnesium b. water c. air d. methane 28. Which of the following statements best describes the electron? a. It has a smaller mass than a proton and a negative charge b. It has a greater mass than a proton and a negative charge Page 2 of 7
3 c. It has a smaller mass than a proton and a positive charge d. It has a greater mass than a proton and a positive charge 29. How many electrons are present in a nitrogen atom? a b. 7 c. 14 d How many protons are there in a nucleus of an atom of beryllium? a. 9 b. 2 c. 5 d What is the number of neutrons in the nucleus of the atom below? P a. 47 b. 17 c. 15 d What is the symbol for an atom containing 20 protons and 22 neutrons? 40 Ca 40 a. 20 b. Ti c. Ca 42 Ti 20 d What is the total number of nucleons (protons and neutrons) in the atom below? Se a. 79 b. 34 c. 113 d All atoms of an element have the same a. atomic mass b. number of neutrons c. atomic number d. number of nucleons 35. How many neutrons are in the nucleus of a chlorine 37 atom? a. 37 b. 35 c. 20 d Atomic mass is measured in atomic mass units (amu) that are based on an atom of a. 14 N equal to amu b. 32 S equal to amu c. 16 O equal to amu d. 12 C equal to amu 37. What is the average atomic mass of element X if a sample is composed of 85.0 % 127 X, 12.0 % 130 X, and 3.00 % 128 X? a amu b amu c amu d amu 38. When the following equation is balanced using the smallest whole numbers, what would be the coefficient of H 2? H 2 + Fe 3 O 4 Fe + H 2 O a. 1 b.2 c. 3 d When the following equation is balanced using the smallest whole numbers, what would be the coefficient of O 2? NH 3 + O 2 HNO 3 + H 2 O a. 1 b. 2 c. 3 d. 4 Page 3 of 7
4 40. When the following equation is balanced using the smallest whole numbers, what would be the coefficient of CO 2? C 2 H 6 + O 2 CO 2 + H 2 O a. 1 b. 2 c. 3 d When the following equation is balanced using the smallest whole numbers, what would be the coefficient of Al? Al + O 2 Al 2 O 3 a. 1 b. 2 c. 3 d When the following equation is balanced using the smallest whole numbers, what would be the coefficient of C 5 H 12? C 5 H 12 + O 2 CO 2 + H 2 O a. 1 b. 2 c. 4 d When the following equation is balanced using the smallest whole numbers, what would be the coefficient of NaCl? FeCl 2 + Na 2 CO 3 FeCO 3 + NaCl a. 2 b. 3 c. 4 d What is the correct chemical formula for iron (III) oxide? a. Fe 3 O b. FeO 3 c. Fe 3 O 2 d. Fe 2 O What is the formula for magnesium sulfide? a. MnSO 3 b. MgSO 3 c. MnS d. MgS 46. What is the correct name for Na 2 SO 4? a. disodium sulfite b. sodium sulfur tetraoxide c. soldium sulfite d. sodium sulfate 47. Which formula correctly represents the compound calcium hydroxide? a. Ca(OH) 2 b. Ca 2 OH c. CaOH 2 d. CaOH 48. The correct formula for ammonium carbonate is. a. NH 4 CO 3 b. (NH 4 ) 2 (CO 3 ) 2 c. (NH 4 ) 2 CO 3 d. NH 4 (CO 3 ) The correct name for SO 3 is. a. sulfur oxide b. sulfite c. sulfur trioxide d. sulfate 50. What is the name of the compound whose formula is H 2 SO 4? a. hydrosulfuric acid b. sulfurous acid c. sulfuric acid d. hydrosulfurous acid END OF EXAM Page 4 of 7
5 Useful Information SI Prefixes Prefix Symbol Multiple Prefix Symbol tera T 10 1 deci d giga G 10 2 centi c mega M 10 3 milli m kilo k 10 6 micro µ hecto h 10 9 nano n 10 deca da pico p Length Volume 1 m = 100 cm m = meter 1 L = 1000mL L = liter 1 m = 1000 mm mm = millimeter 1 L = qt qt = quart 1 m = nm nm = nanometer 1 ml = 1 cm 3 ml = milliliter 1 km = 1000 m km = kilometer 1 gal = 4 qt cm 3 = cubic centimeter 1 m = in in = inch gal = gallon 1 in = 2.54 cm cm = centimeter 1 mi = 5280 ft mi = mile 12 in = 1 ft ft = foot Mass Time 1 kg = 1000 g kg = kilogram 1 min = 60 sec min = minute 1 lb = g g = gram 1 h = 60 min s= second 1000 mg= 1 g lb = pound h = hour µg = 1 g µg = microgram Energy 1 cal = J cal = calorie 1 kcal = kj J = joule 1 kj = 1000 J kj = kilojoule 1 kcal = 1000 cal kcal = kilocalorie Page 5 of 7
6 Atomic Masses of the Elements Element symbol Atomic number Atomic mass Aluminum Al Americium Am Antimony Sb Argon Ar Arsenic As Astatine At Barium Ba Berkelium Bk Beryllium Be Bismuth Bi Boron B Bromine Br Cadmium Cd Calcium Ca Carbon C Cesium Cs Chlorine Cl Chromium Cr Cobalt Co Copper Cu Fluorine F Gold Au Hafnium Hf Helium He Hydrogen H Iodine I Iron Fe Krypton Kr Lead Pb Lithium Li Magnesium Mg Manganese Mercury Mn Hg Neon Ne Nickel Ni Nitrogen N Oxygen O Phosphorus P Scandium Sc Silicon Si Silver Ag Sodium Strontium Na Sr Sulfur S Tin Sn Titanium Ti Tungsten W Uranium U Vanadium V Xenon Xe Zinc Zn Page 6 of 7
7 Answers 1. c 2. b 3. c 4. d 5. c 6. d 7. d 8. d 9. a 10. b 11. d 12. c 13. d 14. a 15. b 16. d 17. d 18. a 19. c 20. a 21. c 22. c 23. b 24. b 25. a 26. a 27. c 28. a 29. b 30. d 31. b 32. c 33. a 34. c 35. c 36. d 37. a 38. d 39. b 40. d 41. d 42. a 43. a 44. d 45. d 46. d 47. a 48. c 49. c 50. c Page 7 of 7
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