General Chemistry Chem 110 Revision Chapter 1& 2

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

What temperature is 95 °F when converted to degrees Celsius? 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) 310 K* B) 99 K C) 236 K D) 67 K . 6 What temperature is 77 K when converted to degrees Celsius?   A) –296 °C B) 105 °C C) –196 °C * D) 25 °C

7. 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 8. What is 25.4 mg when converted to kilograms?   A) 2540 kg B) 2.54 x10–5 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

A. 10-9 and 10-6. B. 106 and 10-3. C. 103 and 10-3. D. 109 and 10-6. * 10. The SI prefixes giga and micro 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   11. Lithium is the least dens metal known (density= 0.53 g/cm3 ). What is the volume occupied by 1.2x103 g of lithium?  A. 0.0875 cm3 B. 11.4 cm3 C. 0.44x10-3 cm3 D. 2.26x103 cm3 *

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 X10-21Tg * B. 75 X1024 Tg C. 0.75 Tg D. 7.5 X1021 Tg 14. The SI prefixes giga and micro 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.  

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

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. Mega * B. nano C. Tera D. milli

Which of the following prefixes means 1/100? A. kilo B. deci C. 21. A piece of iron (Fe) metal weighing 194.3 g is placed in a graduated cylinder containing 242.0 mL of water. The volume of water now reads 260.5 mL. From these data calculate the density of iron. A. 10.5 g/cm3 * B. 1.25 g/cm3 C. 0.746 g/cm3 D. 21.0 g/cm3 22. Which of the following SI base units is used to measure Electrical Current?   A. candela B. kelvin C. * Ampere D. mole 23 Which of the following prefixes means 1/100?   A. kilo B. deci C. Centi * D. milli

24 Which of the following SI base units is not commonly used in chemistry?   A. kilogram B. kelvin C. * ampere D. 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 X1024 pg * C. 0.75 pg D. 75 X10-24 pg

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 56.12g and 87.39g,respectively, and the density of water is 0.9976g/cm3, Calculate the volume of the flask in cm3 ?   A. 56.255 cm3 B. 87.6 cm3 C. 31.345 cm3 * D. 143.855 29. Express 2200 nm as picometers. A. 2.2X10-7 pm B. 22.0 pm C. 220 pm D. 2.2X106 pm *

31.The SI prefixes Tara and nano represent, respectively: 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/cm3. what is the mass of 65 mL of octane?  A. 45.6 g * B. 92.6 g C. 22.5 g D. 110 g

33. How many cubic centimeters are there in exactly one cubic meter?  A. 1  10-6 cm3 B. 1  10-3 cm3 C. 1  10-2 cm3 D. 1  106 cm3 * 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

37. How many cm2 are there in exactly m2 ? A. 1  10-6 cm3 B. 1  10-3 cm3 C. 1  10-2 cm3 D. 1  104 cm2 * 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 20/04/1440

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. deci- d 10 * B. kilo- K 103 C. Pico - p 10-12 D. micro- M 10-6 42. A lead sphere has a mass of 1.2x104 g, and its volume is 1.05x103 cm3. Calculate the density of lead ?  A. 0.0875 g/cm3 B. 11.4 g/cm3 * C. 1.26x107 g/cm3 D. 0.8 g/cm3

43. The melting point of mercury is -36. 00F 43. The melting point of mercury is -36.00F. Express this temperature in degrees of Celsius and Kelvin. A. -1260C and 147K B. -380C and 235K* C. -330C and 252K D. 390C and 314K 44. Candela (cd) is the SI base unit of A. time B. mass C. electrical current D. Luminosity * 45. How many mL in 0.005 L  A. 5 mL* B. 0.5 mL C. 50 mL D. 0.000005 mL

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 82Pb whose mass number is 208?  A. 82 B. 126* C. 208 D. 290 E. none of them

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, Mg2+, 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, S2- , 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  

ماهو المركب الذي له نفس الصيغة الاولية مثل المركب C6H12O6 7. Which compound has the same empirical formula as C6H12O6?   A) * C12H24O12 B) C3H3O3 C) CH2ON D) CHO2 ماهو المركب الذي له نفس الصيغة الاولية مثل المركب C6H12O6 8. Which of the following compounds is named lithium carbonate?   A) Na2CO3 B) LiHCO3 C) LiCO D) * Li2CO3 9. What is the formula for ammonium sulfate?   A) NH4SO4 B) NH4(SO4)2 C) * (NH4)2SO4 D) NH4S

10. 40Ca and 39K 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) H2O (B) HCl * (C) Ba2+ (D) O3 13. Which of the following expressions represents two molecules of water? H2O H2O2 2 H2O * 2 HO2 14. Which molecule from the following has the largest mass A . HBr B. HCl C. HF D. HI *

15. Which of these compounds is a binary compound? NaCl * MgSO4 NaOH HCN 16. Which of these compounds is a ternary compound? NaCl H2O NaOH * MgBr2 17. the species S2-, F-, and Cl- are all cations anions * isotopes Halogens

16. An example of a monoatomic gas Br2 HCl NO Ar * 17. Atoms with the same number of electrons and number of protons are called… ions isotopes neutral atoms * 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 ? N2O N2O4 NO2 NO *

20. One of the following molecule is not a polyatomic molecule: A. NH3 B. CH4 C. H2O D. HCl * 21. SO42- 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 FCl3 A. Iron (II) chloride Iron (III) trichloride Iron (III) chloride * D. monoiron trichloride

23. Which of these ions is a monoatomic ions ? Na+ * SO42- NO3- NH4+ 24. Which of these compounds is a ternary compound? NaCl H2O NaOH * MgBr2 25. Which of these compounds is a binary compound? NaCl * MgSO4 NaOH HCN

26. Which of these compounds is a ternary compound? NaCl H2O NaOH * MgBr2 27. molecules consist of the same element with different numbers of atoms and chemical structure are called …  A. ions. B. neutrons. allotropes * isotopes. 28. A magnesium ion, 12Mg2+, 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, 16S2- , 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. Ca3N2 B. Ca(NO3)2 * C. Ca2NO3 D. Ca2NO2 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 16S-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. Cu2PO4 B. Cu3(PO4)2 * C. Cu2PO3 D. Cu(PO4)2 36. The correct name for NH4NO3 is  A. ammonium nitrate. * B. ammonium nitrogen trioxide. C. ammonia nitrogen oxide. D. hydrogen nitrogen oxide. 37. The correct name for PCl5 is  A. monophosphate pentachloride B. phosphorus chloride C. chlorophosphate D. phosphorus pentachloride *

38. Which is the formula for the dinitrogen pentoxide   A. NO2 B. N2O5 * C. N2O7 D. N2O2 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: P2O5 * O3 Na2O2 C3H6