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Chemistry Practice Test #10

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What is the percentage composition of calcium in calcium hydroxide, Ca(OH)2? (1 mol = 74 g)

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The organic acid that can be made from ethanol is

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Which of the following solids has a brilliant blue color?

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Which of the following is true regarding an Ne atom with a mass number of 20 and an O2- ion with a mass number of 16?

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A property that must decrease when a gas condenses into a liquid

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What is the correct term for the phase change from gas directly to solid?

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The oxidation number for hydrogen in NaH is

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Has mass and occupies space

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The concentration of a solution of Ca(OH)2 when 74 grams are completely dissolved in a container holding 2 liters of water?

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Proposes basic postulates concerning elements and atoms

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A transition element that occurs when the inner 3d orbital is partially filled

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Which salt listed in Appendix 4 of this book has the greatest solubility in water under equal conditions?

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In 12.4 hours, a 100 gram sample of an element decays so that its mass is 25 grams. What is the approximate half-life of this radioactive substance?

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The most active metallic elements are found in

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The reaction: HI(aq) + LiOH(aq) <=>H2O(l) + LiI(aq) is classified as

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Has 7 valence electrons

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What is the approximate pH of a 0.005 M solution of H2SO4?

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If two atoms that differ in electronegativity combine by chemical reaction and share electrons, the bond that joins them will be

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Releases a gas with the addition of dilute acid

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In the reaction 2KClO3 + MnO2 + 2KCl + 3O2 (g) + MnO2, which substance is the catalyst?

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An element that has a high first ionization energy and is chemically inactive would most likely be

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The key element delivered in soil fertilizer

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Which substance can be decomposed chemically?

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What is the molar concentration of a 500-milliliter solution that contains 20 grams of CaBr2 (formula weight = 200)?

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How much water, in liters, must be added to 0.50 liter of 6.0 M HCl to make the solution 2.0 M?

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The type of bond between atoms of potassium and chloride when they form a crystal of potassium chloride

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When Fe2+ is oxidized to Fe3+, the Fe2+ ion

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Which of the following reactions produces a yellow precipitate?

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Where are the highest ionization energies found in the Periodic Table?

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2Na(s) + Cl2(g) <=> 2NaCl(s) + 822 kJ
How much heat is released by the above reaction if 0.5 mole of sodium reacts completely with chlorine?

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