AP Chemistry final exam review 0809

AP Chemistry final exam review 0809 - AP Chemistry Semester...

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AP Chemistry Semester 1 Final Exam Review Problems 2008-2009 Chapter 1: Matter and Measurement Topics: Classifying Matter; Elements and Atoms; Compounds and Molecules; Physical and Chemical Properties; Physical and Chemical Changes; Units of Measurement; Precision Accuracy and Experimental Error. 1. When 10.0g of marble chips (calcium carbonate) is treated with 50.0mL of hydrochloric acid (density = 1.096g/mL), the marble dissolves, giving a solution and releasing carbon dioxide gas. The solution weighs 60.4g. How many liters of carbon dioxide gas are released if the density of the gas is 1.798g/L? 2. Some bottles of colorless liquids were being labeled when the technicians accidentally mixed them up and lost track of their contents. A 15.0mL sample withdrawn from one bottle weighed 22.3g. The technicians knew that the liquid was either acetone, benzene, chloroform, or carbon tetrachloride (which have densities of 0.792g/cm 3 , 0.899g/cm 3 , 1.489g/cm 3 and 1.595g/cm 3 , respectively). What was the identity of the liquid? Chapter 2: Atoms and Elements Topics: Protons, Electrons, and Neutrons: Development of Atomic Structure; Atomic Number and Atomic Mass; Isotopes; Atomic Weight; Atoms and the Mole; The Periodic Table 3. Natural carbon, which has an atomic mass of 12.011amu, consists of carbon-12 and carbon- 13 isotopes. Given that the mass of carbon-13 is 13.00335amu, what would be the average atomic mass (in amu) of a carbon sample prepared by mixing equal numbers of carbon atoms from a sample of natural carbon and a sample of pure carbon-13? 4. A monoatomic ion has a charge of 2+. The nucleus of the ion has a mass number of 62. The number of neutrons in the nucleus is 1.21 times that of the number of protons. How many electrons are in the ion? What is the name of the element? Chapter 3: Molecules, Ions, and Their Compounds Topics: Molecules, Compounds and Formulas; Molecular Models; Ionic Compounds: Formulas, Names and Properties; Molecular Compounds: Formulas, Names and Properties; Formulas, Compounds and the Mole; Describing Compound Formulas (Percent Composition, Empirical vs. Molecular Formula, etc.); Hydrated Compounds 5. A sample of metallic element X, weighing 3.177g combines with 0.6015L of O 2 gas (at normal pressure and 20.0 o C) to form the metal oxide with the formula XO. If the density of O 2 gas under these conditions is 1.330g/L, what is the mass of the oxygen? The atomic mass of oxygen is 15.9994amu. What is the atomic mass of X? What is the identity of X?
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6. A sample of green crystals of nickel(II)sulfate heptahydrate was heated carefully to produce
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AP Chemistry final exam review 0809 - AP Chemistry Semester...

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