GENERAL CHEMISTRY CHEM 110 REVISION 1 2 3

GENERAL CHEMISTRY CHEM 110 REVISION

1 2. 3 Which of the following is not an SI base unit? A) kilometer * B) kilogram C) second D) kelvin Which of the following SI base units is not commonly used in chemistry? A) kilogram B) kelvin C) candela * D) mole Which of the following prefixes means 1/1000? A) kilo B) deci C) centi D) milli *

4. What temperature is 95 °F when converted to degrees Celsius? A) 63 °C B) 35 °C* C) 127 °C D) 15 °C 5. What temperature is 37 °C when converted to kelvin? A) B) C) D) . 6 310 K* 99 K 236 K 67 K What temperature is 77 K when converted to degrees Celsius? A) – 296 °C B) 105 °C C) – 196 °C* D) 25 °C

7. 8. What is 22. 6 m when converted to decimeters? A) 0. 226 dm B) 2. 26 dm C) 226 dm * D) 2. 26 x 10– 3 dm What is 25. 4 mg when converted to kilograms? A) 2540 kg B) 2. 54 x 10– 5 kg * C) 2. 54 kg D) 2. 54 x 104 kg ﻣﺎﻫﻲ ﺍﻟﻘﺮﺍﺀﺓ ﺍﻟﺮﻗﻤﻴﺔ ﻟﺪﺭﺟﺔ ﺍﻟﺤﺮﺍﺭﺓ ﻋﻠﻰ ﺍﻟﺘﺮﻣﻮﻣﺘﺮ ﺍﻟﻤﺌﻮﻱ ﺍﻟﺘﻲ ﺗﺘﺴﺎﻭﻯ ﻣﻊ ﺩﺭﺟﺔ ﺍﻟﺤﺮﺍﺭﺓ ﻋﻠﻰ ﺍﻟﺘﺮﻣﻮﻣﺘﺮ ﺍﻟﻔﻬﺮﻳﻨﻬﺎﻳﺘﻲ 9. At what temperature does the numerical reading on a Celsius thermometer equal that on a Fahrenheit thermometer? A) 0 °C B) – 40 °C * C) 100 °C D) – 32 °C

10. A. B. C. D. E. The SI prefixes giga and micro represent, respectively: 10 -9 and 10 -6. 106 and 10 -3. 103 and 10 -3. 109 and 10 -6. * 10 -9 and 10 -3 11. Lithium is the least dens metal known (density= 0. 53 g/cm 3 ). What is the volume occupied by 1. 2 x 103 g of lithium? A. B. C. D. 0. 0875 cm 3 11. 4 cm 3 0. 44 x 10 -3 cm 3 2. 26 x 103 cm 3 *

12. Convert -77 F to kalvin ? A. 212. 6 K * B. -212. 6 K C. -28. 1 K D. +13. 5 K 13. Express 7. 5 ng as Tg A. 7. 5 X 10 -21 Tg * B. 75 X 1024 Tg C. 0. 75 Tg D. 7. 5 X 1021 Tg 14. The SI prefixes giga and micro represent, respectively: A. B. C. D. E. 10 -9 and 10 -6. 106 and 10 -3. 103 and 10 -3. 109 and 10 -6. * 10 -9 and 10 -3. 6

15. Ammonia boils at -33. 4 C. What temperature is this in F? A. -60. 1 F B. -92. 1 F C. -28. 1 F * D. +13. 5 F 16. Which of the following prefixes is not correct? A. Kilo- k 10 -3 * B. micro-µ 10 -6 C. nano- n 10 -9 D. deci- d 10 -1 17. Candela (cd) is the SI base unit of A. time B. length C. luminous intensity * D. electrical current 7

18. Express 5500 nm as picometers. A. 5. 5 10 -6 pm B. 55. 0 pm C. 550 pm D. 5. 5 106 pm * 19. The SI prefix giga represents: A. 10 -6 B. 106 C. 103 D. 109 * 20 Which of the following prefixes means 106 ? A. B. C. D. Mega * nano Tera milli 8

21. A piece of iron (Fe) metal weighing 194. 3 g is placed in a graduated cylinder containing 242. 0 m. L of water. The volume of water now reads 260. 5 m. L. From these data calculate the density of iron. A. 10. 5 g/cm 3 * B. 1. 25 g/cm 3 C. 0. 746 g/cm 3 D. 21. 0 g/cm 3 22. 23 Which of the following SI base units is used to measure Electrical Current? A. candela B. kelvin C. Ampere * D. mole Which of the following prefixes means 1/100? A. kilo B. deci C. Centi * D. milli 9

24 Which of the following SI base units is not commonly used in chemistry? A. B. C. D. kilogram kelvin ampere * mole 25. The diameter of an atom is approximately 1 10 -7 mm. What is this diameter when expressed in nanometers? A. 1 10 -18 nm B. 1 10 -15 nm C. 1 10 -9 nm D. 1 10 -1 nm* 26. Express 75 Tg as pg A. 7. 5 pg B. 75 X 1024 pg * C. 0. 75 pg D. 75 X 10 -24 pg 10

27. The SI unit of time is the A. hour B. Second * C. minute D. ampere 28 The following procedure was used to determine the volume of a flask. The flask was weighted dry and then filled with water. If the masses of empty flask and filled flask were 56. 12 g and 87. 39 g, respectively, and the density of water is 0. 9976 g/cm 3, Calculate the volume of the flask in cm 3 ? A. B. C. D. 56. 255 cm 3 87. 6 cm 3 31. 345 cm 3 * 143. 855 29. Express 2200 nm as picometers. A. 2. 2 X 10 -7 pm B. 22. 0 pm C. 220 pm D. 2. 2 X 106 pm * 11

30. The SI prefixes kilo and milli represent, respectively: A. 10 -9 and 10 -6 B. 106 and 10 -3 C. 103 and 10 -3 * D. 109 and 10 -6 E. 10 -9 and 10 -3 31. The SI prefixes Tara and nano represent, respectively: A. 10 -9 and 10 -6 B. 106 and 10 -3 C. 103 and 10 -3 D. 1012 and 10 -9 * 32. The density of octane is 0. 702 g/cm 3. what is the mass of 65 m. L of octane? A. 45. 6 g * B. 92. 6 g C. 22. 5 g D. 110 g 12

33. How many cubic centimeters are there in exactly one cubic meter? A. 1 10 -6 cm 3 B. 1 10 -3 cm 3 C. 1 10 -2 cm 3 D. 1 106 cm 3 * 34. 6. 0 km is how many micrometers? A. 6. 0 106 µm B. 1. 7 10 -7 µm C. 6. 0 109 µm * D. 1. 7 10 -4 µm 35. Ammonia boils at -33. 4 C. What temperature is this in F? A. -60. 1 F B. -92. 1 F C. -28. 1 F * D. +13. 5 F 36. At what temperature does the numerical reading on a Fahrenheit thermometer equal that on a Celsius thermometer? A. 0 °F B. – 40 °F * C. 100 °F D. – 32 °F 13

37. How many cm 2 are there in exactly m 2 ? A. 1 10 -6 cm 3 B. 1 10 -3 cm 3 C. 1 10 -2 cm 3 D. 1 104 cm 2 * 38. Which of these quantities represents the largest mass? A. 2. 0 102 mg B. 0. 0010 kg C. 1. 0 105 g D. 2. 0 102 cg * 39. Which of these quantities represents the smallest mass? A. 2. 0 102 mg B. 0. 0010 kg C. 1. 0 105 g * D. 2. 0 102 cg 15/07/42 14

40. Convert -77 F to kalvin ? A. 212. 6 K * B. -212. 6 K C. -28. 1 K D. +13. 5 K 41. Which of the following prefixes is not correct A. decid 10 * B. kilo. K 103 C. Pico p 10 -12 D. micro. M 10 -6 42. A lead sphere has a mass of 1. 2 x 104 g, and its volume is 1. 05 x 103 cm 3. Calculate the density of lead ? A. 0. 0875 g/cm 3 B. 11. 4 g/cm 3 * C. 1. 26 x 107 g/cm 3 D. 0. 8 g/cm 3 15

43. The melting point of mercury is -36. 00 F. Express this temperature in degrees of Celsius and Kelvin. A. -1260 C and 147 K B. -380 C and 235 K* C. -330 C and 252 K D. 390 C and 314 K 44. Candela (cd) is the SI base unit of A. time B. mass C. electrical current D. Luminosity * 45. How many m. L in 0. 005 L A. B. C. D. 5 m. L* 0. 5 m. L 50 m. L 0. 000005 m. L

1. An anion is defined as A. a charged atom or group of atoms with a net negative charge. * B. a stable atom. C. a group of stable atoms. D. an atom or group of atoms with a net positive charge. 2. Atoms of the same element with different mass numbers are called A. ions. B. neutrons. C. allotropes. D. chemical families. E. isotopes. * 3. How many neutrons are there in an atom of lead A. 82 B. 126* C. 208 D. 290 E. none of them 82 Pb whose mass number is 208?

4. An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron) A. 15 p, 16 n, 15 e B. 16 p, 15 n, 16 e * C. 16 p, 31 n, 16 e D. 32 p, 31 n, 32 e E. 16 p, 16 n, 15 e 5. A magnesium ion, Mg 2+, has A. 12 protons and 13 electrons. B. 24 protons and 26 electrons. C. 12 protons and 10 electrons. * D. 24 protons and 22 electrons. E. 12 protons and 14 electrons. 6. A sulfide ion, S 2 - , has: A. 16 protons and 16 electrons B. 32 protons and 16 electrons C. 16 protons and 14 electrons D. 16 protons and 18 electrons * E. 32 protons and 18 electrons

7. Which compound has the same empirical formula as C 6 H 12 O 6? A) B) C) D) C 12 H 24 O 12 C 3 H 3 O 3 CH 2 ON CHO 2 * C 6 H 12 O 6 ﻣﺎﻫﻮ ﺍﻟﻤﺮﻛﺐ ﺍﻟﺬﻱ ﻟﻪ ﻧﻔﺲ ﺍﻟﺼﻴﻐﺔ ﺍﻻﻭﻟﻴﺔ ﻣﺜﻞ ﺍﻟﻤﺮﻛﺐ 8. Which of the following compounds is named lithium carbonate? A) Na 2 CO 3 B) Li. HCO 3 C) Li. CO D) Li CO * 9. What is the formula for ammonium sulfate? A) NH 4 SO 4 B) NH 4(SO 4)2 C) (NH ) SO * 2 3 4 2 D) NH 4 S 4

10. 40 Ca and 39 K both have the same (A) number of electrons (B) atomic number (C) mass number (D) number of neutrons* 11. Give the number of protons, neutrons and electrons in (A) 16 p, 16 n, 16 e (B) 16 p, 33 n, 17 e (C) 16 p, 17 n, 16 e * (D) 16 p, 19 n, 16 e 12. which of the following is a metalloid (A) Bi (B) Cu (C) Ca (D) As *

12. an example of a diatomic molecule is (A) H 2 O (B) HCl * (C) Ba 2+ (D) O 3 13. Which of the following expressions represents two molecules of water? A. H 2 O B. H 2 O 2 C. 2 H 2 O * D. 2 HO 2 14. Which molecule from the following has the largest mass A. HBr B. HCl C. HF D. HI *

15. A. B. C. D. 16. A. B. C. D. Which of these compounds is a binary compound? Na. Cl * Mg. SO 4 Na. OH HCN Which of these compounds is a ternary compound? Na. Cl H 2 O Na. OH * Mg. Br 2 17. the species S 2 -, F-, and Cl- are all A. cations B. anions * C. isotopes D. Halogens

16. An example of a monoatomic gas A. Br 2 B. HCl C. NO D. Ar * 17. Atoms with the same number of electrons and number of protons are called… A. ions B. isotopes C. neutral atoms * D. different atoms 18. Al 3+ is an example of one of the following: A. amonatomic anion B. monatomic cation * C. a polyatomic cation D. a polyatomic anion 19. Which of the following molecule is a diatomic molecule ? A. N 2 O B. N 2 O 4 C. NO 2 D. NO *

20. One of the following molecule is not a polyatomic molecule: A. NH 3 B. CH 4 C. H 2 O D. HCl * 21. SO 42 - is an example of one of the following: A. amonatomic anion B. monatomic cation C. a polyatomic cation D. a polyatomic anion * 22. The Stock system name for FCl 3 A. Iron (II) chloride B. Iron (III) trichloride C. Iron (III) chloride * D. monoiron trichloride

23. A. B. C. D. Which of these ions is a monoatomic ions ? Na+ * SO 42 NO 3 NH 4+ 24. A. B. C. D. Which of these compounds is a ternary compound? Na. Cl H 2 O Na. OH * Mg. Br 2 25. A. B. C. D. Which of these compounds is a binary compound? Na. Cl * Mg. SO 4 Na. OH HCN

26. A. B. C. D. Which of these compounds is a ternary compound? Na. Cl H 2 O Na. OH * Mg. Br 2 27. molecules consist of the same element with different numbers of atoms and chemical structure are called … A. ions. B. neutrons. C. allotropes * D. isotopes. 28. A magnesium ion, 12 Mg 2+, has A. 12 protons and 13 electrons. B. 24 protons and 26 electrons. C. 12 protons and 10 electrons. * D. 24 protons and 22 electrons.

29. A sulfide ion, 16 S 2 - , has: A. 16 protons and 16 electrons B. 32 protons and 16 electrons C. 16 protons and 14 electrons D. 16 protons and 18 electrons * E. 32 protons and 18 electrons 30. Which of these pairs of elements would be most likely to form an ionic compound? A. P and Br B. Cu and K C. C and O D. O and Zn * E. Al and Rb 31. Which of these elements is most likely to be a good conductor of electricity? A. N B. S C. He D. Cl E. Fe *

32. What is the formula for the ionic compound formed by calcium ions and nitrate ions? A. Ca 3 N 2 B. Ca(NO 3)2 * C. Ca 2 NO 3 D. Ca 2 NO 2 33. Which of these pairs of elements would be most likely to form a molecular compound? A. Na and Br B. Ca and O C. C and O * D. Zn and O 34. An atom of the isotope 16 S-31 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron) A. 15 p, 16 n, 15 e B. 16 p, 15 n, 16 e * C. 16 p, 31 n, 16 e D. 32 p, 31 n, 32 e

35. Which is the correct formula for copper(II) phosphate? A. Cu 2 PO 4 B. Cu 3(PO 4)2 * C. Cu 2 PO 3 D. Cu(PO 4)2 36. The correct name for NH 4 NO 3 is A. ammonium nitrate. * B. ammonium nitrogen trioxide. C. ammonia nitrogen oxide. D. hydrogen nitrogen oxide. 37. The correct name for PCl 5 is A. monophosphate pentachloride B. phosphorus chloride C. chlorophosphate D. phosphorus pentachloride *

38. Which is the formula for the dinitrogen pentoxide A. NO 2 B. N 2 O 5 * C. N 2 O 7 D. N 2 O 2 39. The name for the group of those elements (F, Cl, Br, I) is: A. Halogen group * B. Nobel gas C. Alkaline group D. Transition metal group 40. of the following, the only empirical formula is: A. B. C. D. P 2 O 5 * O 3 Na 2 O 2 C 3 H 6