NOTE—Atomic radius decreases from left to right even though the atomic number increases. Molecular structure dictates molecular properties. In essence, this IS chemistry. Pay attention to this topic, learn it well. Learn the strong acids seven of them and the strong bases metal hydroxides like NaOH. Learn how to do these things for any atom in any molecule.
Now go to the Electrochem chapter and get the equations involving E0cell. There will be a bunch of them. Learn how to use these equations. Holy moly, do you need to learn THIS!! But for stoichiometry, you need only one equation—grams to moles to moles to grams. Grams of A—moles A—moles B—grams B. Grams to moles and moles to grams uses the molecular mass of the different substances while moles—moles uses the balanced chemical equation.
More equation and math-intensive chapters here. Go to the end of each chapter and copy down the equations in the summary section. Get the Arrhenius equation the effect of temp on the reaction rate so you can calc activation energies always positive numbers.
Equilibrium requires you to memorize the K equation products over reactants. Go get that general equation and commit it to memory.
Other equilibrium equations? Another topic that will follow you up the chemistry food chain. Henderson-Hasselbach—go find that equation right now and learn how to use it.
Sum of the products — sum of the reactants. Learn this one too. For H enthalpy , learn what the signs mean! Exothermic negative sign, heat is released , endothermic positive, heat consumed…colder. This is a lot of information for a very small part of the exam. Explanation: The other answers are at least plausible as represents the atomic mass of silver and 68 represents the difference between atomic number and atomic mass the number of neutrons. There IS isotopic variation in most atoms, but that doesn't change the atomic number number of protons.
Temperature needs to be expressed in Kelvin, not C. Volume needs to be expressed in L, not mL. Only d uses the correct units for all variables. Explanation: While two answers represent calcium phosphate, only one has the correct ratio of these ions.
Explanation: Any thermochemical process that releases heat to the surroundings as this one does is exothermic and the calculation for the DHrxn would then be negative.
Explanation: Periodic trends in the acidity of binary hydride compounds increase as you go from the top to the bottom of a group on the periodic table. Na Al Mg None of the above - they all have the same second ionization energy. Explanation: Why? The second ionization of sodium requires the removal of a core electron. Core electrons require significantly more energy to remove than valence electrons.
The electrons removed from Mg and Al are only valence electrons. P atomic number 15 Ar atomic number 18 Si atomic number 14 Cl atomic number The lowest atomic number corresponds to the fewest number of protons in the nucleus. This result is counterintuitive—most people think that atoms get larger as the atomic number increases.
Explanation: The structure of a diamond is an interconnected network of carbon atoms covalently bound to four other carbon atoms. To form four bonds, a carbon atom has to hybridize four atomic orbitals.
Freezing Vaporization Condensation Sublimation. Explanation: There are six changes in phases of matter solid to liquid, solid to gas, liquid to gas and the reverse processes. The London dispersion forces between helium atoms are greater than the London dispersion forces between Xenon molecules.
As the molecular weight of the noble gas increases, the freezing point decreases. Helium forms highly polar molecules The London dispersion forces between helium atoms are less than the London dispersion forces of the Xenon molecules. Correct Answer: D. The London dispersion forces between helium atoms are less than the London dispersion forces of the Xenon molecules.
Explanation: Two answers are designed to be obviously wrong. Helium doesn't form molecules of any type. Either way, the freezing point doesn't decrease anyway. Dispersion forces have everything to do with physical properties of noble gases. Xenon has significantly higher dispersion forces than helium. The exam contains approximately 75 questions to be answered in 90 minutes.
Some of these are pretest questions that will not be scored. Questions on the Chemistry exam require candidates to demonstrate one or more of the following abilities:. The subject matter of the Chemistry exam is drawn from the following topics.
The percentages next to the main topics indicate the approximate percentage of exam questions on that topic. Some questions are based on laboratory experiments widely performed in general chemistry and ask about the equipment used, observations made, calculations performed, and interpretation of the results.
The questions are designed to provide a measure of understanding of the basic tools of chemistry and their applications to simple chemical systems. Note: Each institution reserves the right to set its own credit-granting policy, which may differ from the American Council on Education ACE. Contact your college to find out the score required for credit and the number of credit hours granted.
The Chemistry exam covers material that is usually taught in a one-year general chemistry course. This study guide provides practice questions for all 34 CLEP exams. The ideal resource for taking more than one exam. Offered only by College Board. Details about the exam breakdown, credit recommendations, and free sample questions. Guide to understanding how CLEP scores are calculated and credit-granting recommendations for all exams. Recommendations for credit-granting scores from the American Council on Education.
Display Site Navigation. Chemistry The Chemistry exam covers material usually taught in a one-year general chemistry course. Overview The Chemistry exam covers material that is usually taught in a one-year college course in general chemistry.
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