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Chemical Formulas and Composition Stoichiometry Test Bank Graded A+

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MULTIPLE CHOICE 1. There are two different common crystalline forms of carbondiamond and graphite. A less common form called fullerene, C60, also exists. Different forms of the same element in the same physical state are called: a. isotopes. b. isomers. c. alloforms. d. allotropes. e. structural formulas. ANS: D OBJ: Define allotrope. TOP: Chemical Formulas 2. How many atoms are in a sulfuric acid molecule? a. 1 b. 7 c. 5 d. 6 e. 8 ANS: B OBJ: Know the chemical formulae of common acids. TOP: Chemical Formulas 3. If a sample of butane, C4H10, contains a total of 8.0  103 atoms of carbon, how many molecules of butane are in the sample? a. 6.0  103 b. 3.0  103 c. 8.0  103 d. 1.1  104 e. 2.0  103 ANS: E OBJ: Understand the relationship between molecular formula and the number of atoms of a specific type contained in a single compound. | Convert the number of atoms in a substance to the number of molecules in a substance. TOP: Chemical Formulas 4. Name the molecular compound, HNO3. a. ammonia b. nitric acid c. nitrous acid d. nitric oxide e. methane ANS: B OBJ: Know the names and chemical formulae of common acids. download full file at http://testbankcafe.com download full file at http://testbankcafe.com TOP: Chemical Formulas download full file at http://testbankcafe.com download full file at http://testbankcafe.com 5. Name the molecular compound, SO3. a. sulfur oxide b. sulfurous acid c. sulfur trioxide d. sulfuric acid e. none of these ANS: C OBJ: Translate the chemical formula of a binary molecule into a name. TOP: Chemical Formulas 6. Which formula / name pair does not match? a. HNO3 / nitric acid, used to produce explosives b. CH3OH / methyl alcohol, wood alcohol c. CH3CH2OH / ethyl alcohol, alcohol in wine d. CHCl3 / acetic acid, found in vinegar e. CH3CH2OCH2CH3 / diethyl ether, an anesthetic ANS: D OBJ: Know the names and chemical formulae of common acids. | Recognize the names and chemical formulae of common organic compounds. TOP: Chemical Formulas 7. Name the molecular compound, CH3COCH3. a. acetone b. ethanol c. diethyl ether d. propane e. ethyl alcohol ANS: A OBJ: Know the names and chemical formulae of common organic compounds. TOP: Chemical Formulas 8. What is the molecular formula for ethanol? a. CH3COOH b. CH3COCH3 c. CH3CH2OCH2CH3 d. CH3CH2CO2H e. CH3CH2OH ANS: E OBJ: Know the names and chemical formulae of common organic compounds. TOP: Chemical Formulas 9. Butane, a highly combustible hydrocarbon found in disposable lighters, has the chemical formula: a. CO2 b. C4H8 c. C4H10 d. C3H8 e. CH3OCH3

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