AP Chem Unit 1 Progress check scoring guide.pdf - AP...

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AP Chemistry Scoring Guide Unit 1 Progress Check: MCQ Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 1 of 14 1. Which of the following numerical expressions gives the number of moles in of ? A B C D 2. In a lab a student is given a sample of pure metal. Which of the following pieces of information is most useful for determining the number of atoms in the sample? Assume that the pressure and temperature in the lab are and . A The molar mass of B The density of at C The volume of the sample D The ratio of the two main isotopes found in pure 3. A sample of which of the following compounds has the greatest mass?
AP Chemistry Scoring Guide Unit 1 Progress Check: MCQ Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 2 of 14 A B C D 4. The mass spectrum for an unknown element is shown above. According to the information in the spectrum, the atomic mass of the unknown element is closest to
AP Chemistry Scoring Guide Unit 1 Progress Check: MCQ Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 3 of 14 A B C D 5. The mass spectrum represented above is most consistent with which of the following elements? A B C D
AP Chemistry Scoring Guide Unit 1 Progress Check: MCQ Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 4 of 14 6. Based on the mass spectrum of a pure element represented above, the average atomic mass of the element is closest to which of the following? A B C D 7. A student obtains a sample of a white powder labeled as . After completely dissolving the powder in of distilled water, the student adds excess , which causes a precipitate of to form, as represented by the equation above. The student filters the , rinses it, and dries it until its mass is constant. Which of the following scientific questions could best be answered based on the results of the experiment?
AP Chemistry Scoring Guide Unit 1 Progress Check: MCQ Copyright © 2017. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print beyond your school’s participation in the program is prohibited. Page 5 of 14 A Is the used in the experiment pure?

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