front 1 Which statement about compounds is FALSE? a. compounds consist of atoms of two or more different elements that are chemically bonded together b. the elements in a compound cannot be separated or recovered by a physical process c. ionic compounds are composed of cations and anions d. covalent compounds are composed of metals and nonmetals e. intermolecular forces are attractive forces between molecules of a compound, and are responsible for the compound's physical properties | back 1 d. covalent compounds are composed of metals and nonmetals |
front 2 A covalent bond involves which of the following? a. sharing of electrons between two atoms b. transfer of electrons between two atoms c. donation of protons from one atom to another d. electrostatic attraction between opposite charges e. sharing of protons between two atoms | back 2 a. sharing of electrons between two atoms |
front 3 What is the formula of the ionic compound formed when ions of calcium and nitrogen combine? a. CaN b. CaN2 c. Ca2N d. Ca3N2 e. Ca2N3 | back 3 d. Ca3N2 |
front 4 Emergency treatment of cardiac arrest victims sometimes involves injection of a calcium chloride (CaCl2) solution directly into the heart muscle. Which statement about the compound CaCl2 is FALSE? a. this compound is an ionic compound b. the cation in this compound is Ca2+ c. the anion in this compound is Cl2 - d. there are two chloride ions in this compound e. the net charge on this compound is zero | back 4 c. the anion in this compound is Cl2 - |
front 5 At what temperature is a liquid converted into a gas? a. the boiling point of the liquid b. the combustion point of the liquid c. the flash point of the liquid d. the condensation point of the liquid e. 100 Celsius | back 5 a. the boiling point of the liquid |
front 6 The polyatomic ion known as the diphosphate ion is an important intermediate formed in metabolic processes. If the ionic compound calcium diphosphate has the formula Ca2P2O7, which of the following correctly represents the symbol for the diphosphate ion? a. P2O7 4- b. P2O7 14- c. PO4+ d. P 2O7 2- e. PO2- | back 6 a. P2O7 4- |
front 7 Which statement about general bonding characteristics is FALSE? a. bond energy is the amount of energy required to break a bond holding two atoms together b. bond length is the distance of separation of two nuclei in a covalent bond c. triple bonds have higher bond energies than double bonds d. single bonds are easier to break than double bonds e. a triple bond is longer than a single bond | back 7 e. a triple bond is longer than a single bond |
front 8 What statement about the ammonia molecule, NH3, is FALSE? a. the molecule contains three polar bonds b. the molecule itself is not polar c. the molecule has a trigonal pyramidal shape d. the nitrogen atom has one nonbonding pair of electrons e. the pull of the electrons in the N-H bonds is toward the nitrogen atom | back 8 b. the molecule itself is not polar |
front 9 What is the formula of the ionic compound sodium carbonate? a. NaCO2 b. Na2CO2 c. Na2CO3 d. Na(CO3)2 e. Na3CO3 | back 9 c. Na2CO3 |
front 10 What is the name of Fe2(SO4)3 in the Stock system? a. iron monosulfuric acid b. iron (II) sulfate c. iron (III) sulfate d. iron trisulfate e. iron (II) trisulfate | back 10 c. iron (III) sulfate |
front 11 A double bond between two atoms, A and B, ___________. a. is longer than a single bond between the same two atoms b. has a lower bong energy than a single bond between the same two atoms c. arises when two electrons are transferred from A to B d. consists of two electrons shared between A and B e. consists of four electrons shared between A and B | back 11 e. consists of four electrons shared between A and B |
front 12 How many nonbonding electrons are in CH4? a. 0 b. 1 c. 2 d. 3 e. 8 | back 12 a. 0 |
front 13 What is the proper name for Mg(CN)2? a. Manganese carbon nitride b. Manganese dicyanide c. Magnesium dicarbon dinitride d. Magnesium (II) dicyanide e. Magnesium cyanide | back 13 e. Magnesium cyanide |
front 14 What region on the periodic table are elements with the lowest electronegativity values found? a. upper right corner b. bottom right corner c. upper left corner d. bottom left corner e. middle | back 14 d. bottom left corner |
front 15 What kind of bond results when electron transfer occurs between atoms of two different elements? a. ionic b. covalent c. nonpolar d. single e. double | back 15 a. ionic |
front 16 What is the formula of the compound sulfur trioxide? a. S3O b. SO3 c. S(O2)3 d. S3O2 e. S3O2- | back 16 b. SO3 |
front 17 How many dots are present in the Lewis symbol for the fluorine atom? a. 5 b. 6 c. 7 d. 8 e. 10 | back 17 c. 7 |
front 18 Which element has the greatest electronegativity? a. Si b. P c. Cl d. Ar e. Br | back 18 c. Cl |
front 19 Draw the Lewis structures of F2, O2 and N2. Which statement is true? a. all three molecules have single bond between the atoms b. both O2 and N2 have double bonds connecting the atoms c. Fluorine has the shortest bond between the two atoms d. the bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2 e. all three molecules have triple bonds between the atoms | back 19 d. the bond between the nitrogen atoms in N2 is stronger than the bond in F2 and O2 |
front 20 A sample of aluminum contains 2.91 x 1022 atoms of aluminum. What is the mass of this sample? a. 0.767 g b. 1.30 g c. 558 g d. 1.08 x 1021 g e. 7.85 x 1023 g | back 20 b. 1.30 g |
front 21 How is the eaction shown below best classified? Ca(s)+2HCl(aq)---> CaCl2(g)+H2(g) a. decomposition b. combination c. single-replacement d. double-replacement e. precipitation | back 21 c. single-replacement |
front 22 How is the reaction shown below best classified? 2NaCl(s)+F2(g)--->2NaF(s)+Cl2(g) a. decomposition b. combination c. single-replacement d. double-replacement e. precipitation | back 22 c. single-replacement |
front 23 What is the mass of a 0.150 mole sample of sulfur? a. 5.17 g b. 4.68 g c. 214 g d. 0.208 g e. 4.81 g | back 23 e. 4.81 g |
front 24 Lithium oxide can be produced by the reaction shown below. If a manufacturing company wants to make 25.0 g of Li2O, what mass of Li is necessary? 4Li(s)+O2(g)--->2Li2O(s) a. 0.0861 g Li b. 2.903 g Li c. 11.6 g Li d. 12.5 g Li e. 23.2 g Li | back 24 c. 11.6 g Li |
front 25 To convert a given number of moles into the number of atoms, one would multiply by which of the following factors? a. 6.022 x 1023 atoms/1 mol b. 1 mol/6.022 x 1023 atoms c. 1.66 x 10-24 atoms/1 mol d. 1 mol/1.66 x 10-24 atoms e. molar mass | back 25 a. 6.022 x 1023 atoms/1 mol |
front 26 The average mass of one atom of copper is 63.55 amu. What is the mass of Avogadro's number of atoms? a. 3.827 x 1025 amu b. 63.55 g c. 3.827 x 1025 g d. 63.55 atoms e. 63.55 formula units | back 26 b. 63.55 g |
front 27 What is the mass of one mole of carbon atoms? a. 6.022 g b. 12.01 g c. 7.232 g d. 6.022 x 1023 g e. 7.232 x 1024 g | back 27 b. 12.01 g |
front 28 What is the mass of 3.01 mol of sulfur atoms? a. 1.81 x 1024 g b. 32.06 g c. 3.01 g d. 0.150 g e. 96.5 g | back 28 e. 96.5 g |
front 29 How many atoms of sulfur are present in a 155 g sample of sulfur? a. 2.91 x 1024 atoms b. 6.02 x 1023 atoms c. 3.01 x 1023 atoms d. 2.91 x 1023 atoms e. 2.01 x 1023 atoms | back 29 a. 2.91 x 1024 atoms |
front 30 Methanol (CH3OH) is the fuel used by race cars in the Indianapolis 500. It burns in the engine according to the equation below. How many moles of oxygen gas are necessary to react completely with 425 moles of methanol? 2CH3OH(l)+3O2(g)--->2CO2(g)+4H2O(g) a. 3 mol b. 255 mol c. 283 mol d. 638 mol e. 1275 mol | back 30 d. 638 mol |
front 31 Classify the following reaction: H2SO4(aq)+2KOH(aq)--->K2SO4(aq)+2H2O(aq) a. precipitation b. acid-base c. oxidation-reduction d. decomposition e. combustion | back 31 b. acid-base |
front 32 Choose the best classification of the reaction represented by the following equation: Na2SO4(aq)+Ba(OH)2(aq)--->BaSO4(s)+2NaOH(aq) a. decomposition b. combination c. single-replacement d. double-replacement e. none of the choices are correct | back 32 d. double-replacement |
front 33 Choose the best classification of the reaction represented by the following equation: Zn(s)+CuSO4(aq)--->ZnSO4(aq)+Cu(s) a. single-replacement b. double-replacement c. combination d. decomposition e. acid-base | back 33 a. single-replacement |
front 34 What is the mass of 4.35 moles of aluminum? a. 0.163 g b. 117 g c. 2.62 x 1024 g d. 9.78 x 1022 g e. 27.8 g | back 34 b. 117 g |
front 35 Calculate the number of moles of BaF2 in a 10.0 g sample of BaF2. a. 9.77 mol b. 0.115 mol c. 17.4 mol d. 0.0631 mol e. 0.0570 mol | back 35 e. 0.0570 mol |
front 36 What are the formulas for the products that are expected in the double-replacement reaction shown below? FeSO4(aq)+NaOH(aq)---> a. FeOH and SO4Na b. FeNa and SO4OH c. Fe(OH)2 and Na2SO4 d. FeOH and NaSO4 e. FeOH2 and Na2SO4 | back 36 c. Fe(OH)2 and Na2SO4 |
front 37 Consider the hypothetical reaction: 3A2+2B--->C+2D How many moles of D can be formed from 5.0 mol of A2 and excess B? a. 1.7 mol b. 3.3 mol c. 6.7 mol d. 7.5 mol e. 10. mol | back 37 b. 3.3 mol |
front 38 How many iron atoms are present in 0.552 mol of iron? a. 2.798 x 1024 b. 6.02 x 1023 c. 27.98 d. 3.32 x 1023 e. 55.85 | back 38 d. 3.32 x 1023 |
front 39 Diamond is a pure form of the element carbon. If a 2 carat diamond has a mass of 0.396 g, how many carbon atoms are contained in this diamond? a. 3.97 x 1022 atoms b. 6.58 x 10-25 atoms c. 1.99 x 1023 atoms d. 1.99 x 1022 atoms e. 2.38 x 1023 atoms | back 39 d. 1.99 x 1022 atoms |