Chemistry Semester Review
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Questions and Answers

What percentage of your semester grade does the exam account for?

  • 10%
  • 20% (correct)
  • 40%
  • 30%

    • You will be given extra time to finish the test if you do not complete it during the allotted time.

    False (B)

    What materials should you bring to the exam?

    Two #2 pencils, periodic table, and a 4x6 notecard with information written on both sides.

    The exam consists of ______ questions.

    <p>110</p> Signup and view all the answers

    Match the following tasks with their corresponding strategies when taking the test:

    <p>Identify known multiple choice questions = Skip difficult questions Complete simple fill in the blanks = Return to unanswered questions later Work on all matching items = Never leave questions blank</p> Signup and view all the answers

    How many questions are allocated to the topic of Significant Figures?

    <p>6 (B)</p> Signup and view all the answers

    There are more questions about Classification of Matter than about the Atomic Theory.

    <p>False (B)</p> Signup and view all the answers

    What is the primary focus of Outcome 6 in the exam question distribution?

    <p>The Periodic Table</p> Signup and view all the answers

    The total number of questions on Chemical Safety in the exam is ______.

    <p>6</p> Signup and view all the answers

    Match the following outcomes to the number of questions allocated:

    <p>Outcome 2 = 9 questions Outcome 4 = 13 questions Outcome 5 = 21 questions Outcome 7 = 28 questions</p> Signup and view all the answers

    What is the total count of questions focused on the properties and changes of matter?

    <p>4 (C)</p> Signup and view all the answers

    The topic of Isotopes and Average Atomic Mass has more questions than the topic of Measurement.

    <p>True (A)</p> Signup and view all the answers

    Identify the number of questions allocated to the Bohr and Quantum Models Vocabulary.

    <p>11</p> Signup and view all the answers

    Match the type of chemistry with its correct description:

    <p>Organic chemistry = A. Study of carbon compounds. Analytical chemistry = B. Detection, identification, and separation of compounds. Biochemistry = C. Study of how compounds affect human and animal physiology. Inorganic chemistry = D. Study of compounds that do not contain carbon.</p> Signup and view all the answers

    Which of the following describes how elements are created in stars?

    <p>By the fusion of lighter elements into heavier ones (A)</p> Signup and view all the answers

    In a laboratory, sandals are considered safer than sneakers.

    <p>False (B)</p> Signup and view all the answers

    What is the last thing you should do when you are finished with a lab?

    <p>Clean up your workspace and properly dispose of any materials.</p> Signup and view all the answers

    The study of motion, time, force, and temperature with respect to chemical reactions is known as _____ chemistry.

    <p>Physical</p> Signup and view all the answers

    Which hazard is NOT associated with potassium dichromate?

    <p>Highly flammable (C)</p> Signup and view all the answers

    Goggles can be placed on the forehead during a lab break.

    <p>False (B)</p> Signup and view all the answers

    The _____ is a safety device designed to shower individuals with water in case of hazardous spills or exposure.

    <p>safety shower</p> Signup and view all the answers

    It takes at least four people to help someone use the eye wash.

    <p>False (B)</p> Signup and view all the answers

    The safety shower is primarily used to extinguish clothing fires.

    <p>True (A)</p> Signup and view all the answers

    Why are food and drink not allowed in a chemistry lab?

    <p>To prevent contamination and accidental ingestion of hazardous substances.</p> Signup and view all the answers

    Broken glass should be disposed of in the garbage can.

    <p>False (B)</p> Signup and view all the answers

    Match each GHS pictogram to its meaning:

    <p>A = Irritant, sensitizer, acute toxicity (harmful) B = Flammable C = Aquatic toxicity D = Carcinogens, respiratory sensitizers, reproductive toxicity, target organ toxicity, germ cell mutagens E = Oxidizers F = Skin corrosion, serious eye damage G = Acute toxicity (severe)</p> Signup and view all the answers

    Which of the following is a quantitative measure?

    <p>There are 8 cars in the parking lot (C), The pencil is 18.5 cm long (D)</p> Signup and view all the answers

    The estimated digit in the measurement 78.5⁰C is in the ______ place.

    <p>tenths</p> Signup and view all the answers

    What is the purpose of the major scale on a measuring device?

    <p>It establishes the basic divisions of the measurement. (C)</p> Signup and view all the answers

    Which of the following measurements has the most significant figures?

    <p>10.0 kg (D)</p> Signup and view all the answers

    Counting numbers, such as 8 cars, have a finite number of significant figures.

    <p>False (B)</p> Signup and view all the answers

    What is the formula for calculating density?

    <p>Density = mass/volume</p> Signup and view all the answers

    The volume of an object can be calculated using water displacement, where the initial water level is ______ mL and the final water level is ______ mL.

    <p>60/50</p> Signup and view all the answers

    Match each measurement condition with the correct significant figure rule:

    <p>Addition and Subtraction = Round to the least number of decimal places in any number involved Multiplication and Division = Round to the least number of significant figures in any number involved Exact Numbers = Have an infinite number of significant figures Measurements = Have significant figures based on the precision of the measuring instrument</p> Signup and view all the answers

    What is the density of a cylinder that has a mass of 55.5 g and a volume of 33.8 mL?

    <p>1.64 g/mL (A)</p> Signup and view all the answers

    Regular solids have varying shapes and volumes, while irregular solids maintain a fixed form.

    <p>False (B)</p> Signup and view all the answers

    How does one use an electronic balance with a massing boat?

    <p>Place the massing boat on the balance, zero it out, then add the substance to measure its mass.</p> Signup and view all the answers

    Which of the following best describes isotopes?

    <p>Atoms with the same number of protons but different numbers of neutrons. (C)</p> Signup and view all the answers

    Ions are formed when an atom gains or loses neutrons.

    <p>False (B)</p> Signup and view all the answers

    What do you call the symbol that represents the number of protons, neutrons, and electrons in an element?

    <p>Nuclear symbol</p> Signup and view all the answers

    The element with atomic number 6 is known as _______.

    <p>carbon</p> Signup and view all the answers

    Match the following groups of elements with their properties:

    <p>Metals = Good conductors of heat and electricity Nonmetals = Poor conductors, often gaseous Metalloids = Semiconductors, have properties of both metals and nonmetals Noble gases = Inert, rarely react with other elements</p> Signup and view all the answers

    Which isotope would be more abundant if its relative abundance is 95%?

    <p>X-164 (C)</p> Signup and view all the answers

    Elements in the same group of the periodic table have different chemical properties.

    <p>False (B)</p> Signup and view all the answers

    What is the fractional abundance of an isotope with a relative abundance of 30%?

    <p>0.30</p> Signup and view all the answers

    Study Notes

    Chemistry Semester Review

    • Study Hints:
      • Review vocabulary definitions for unfamiliar terms.
      • Focus review time on areas needing more attention.
      • Practice old tests under timed conditions.
      • Practice problems to improve solution speed.
      • Materials to Bring: Two #2 pencils, a periodic table on a 4x6 notecard, with writing on both sides.
    • Exam Facts:
      • Exam is worth 20% of the semester grade.
      • Exam is on paper.
      • Exam has 110 questions (multiple choice, matching, fill-in-the-blank, short answer).
      • Exam time is allocated as per educational plan.
    • Taking the Test:
      • Start with known multiple-choice and matching questions.
      • Prioritize simple fill-in-the-blank and short answer questions.
      • Approach questions you know how to answer.
      • Review skipped problems later. Never skip matching/multiple choice.
    • Semester Exam Question Distribution:
      • Outcome 2: Introduction to Chemistry and Chemical Safety: 9 questions
      • Outcome 3: Measurement, Density, Accuracy and Precision: 9 questions
      • Outcome 4: Matter- States, Classification, Properties, and Changes: 13 questions
      • Outcome 5: The Atom: 20 questions
      • Outcome 6: The Periodic Table: 18 questions
      • Outcome 7: Modern Atomic Theory: 23 questions
      • Outcome 1: Vocabulary: This is a list of key terms in chemistry.

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