Dr. Roberts Chem. 122 Final – Flashcards
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273 K is equal to ___ oC |
0oC |
T/F Isotopes are substances that have same atomic number and the same mass number. |
Faulse |
T/F Sulfur (atomic nubmer = 16) has more valence electrons than Oxygen (atomic number =8) |
F |
T/F A sulfur (S) atom has a smaller radius than a seleium (Se) atom |
True |
T/F The nucleus of an atom has a neutral charge |
F |
T/F The answer to 5.501 / 16.0 should contain three significant digits. |
True |
T/F Magnesium has a larger first ionization energy than calcium. |
True |
T/F There are 4 neutrons in 7Li |
True |
T/F All alkali metals have 1 electron in their outermost s-orbital |
True |
What is a good represent of a pure substance? |
Sugar |
1m = ? mm |
1000 |
T/F Two elements of high electronegativity combine. The bond between them will be covaent. |
True |
T/F A compound formed from calcium and carbon is expected to be an ionic compound |
True M + NM |
T/F Sulfur has a greater electronegativity than phosphorus. |
True |
T/F Sulfur has a greater electronegativity than Oxygen. |
F |
T/F Carbon dioxide is a polar molecule |
F |
T/F The mass of one mole of calcium carbonate is greater than one mole of poassium carbonate |
F |
T/F A mole of CO2 contains the same number of oxygen atoms as a mole of CaCO3 |
F |
T/F When 2.0 mole of nitrogen is reacted, according to the following reaction, the theoretical yield of hydrogen is 7.0 moles. |
F 2 mol N 14.01g 1 mol |
T/F The hydrogen oxygen bond in water is expected to be polar. |
T |
T/F Water, Is expected to be a nonpolar substance. |
F |
T/F The charge on Manganese in MnO2 is +4 |
T |
T/F The combustion of a hydrocarbon is an example of an endothermic reaction |
F exothermic |
T/F Vaporization of water is an exothermic process |
F |
T/F The primary intermolecular forces found in carbon dioxide are dispersion attrations. |
T |
T/F Chlorine is expected to have a greater boiling point than fluorine |
T |
T/F Hydrongen bonding is expected to be the primary intermolecular force in methanol. |
T |
T/F Butane gas is expected to sink in air |
T |
T/F The reaction 2 Al + 3 Br2 - 2AlBr3 is an example of double replacement reaction |
F |
T/F At STP, 1.0 L Ar has a greater number o gas particles than 1.0 L Ne |
F |
T/F A bolloon is filled to a volume of 5.0 L in Des Moines. The volume of the balloon will be greater in Denver where the atmospheric pressure is less than that found in Des Moines. |
T |
T/F Aluminum is reduced in the following reaction: 2 Al + 3 Br2 - 2 AlBr3 |
F |
T/F In general, an increase in temperature will result in an increase in solubility for solid solutes. |
T |
T/F Silver chloride is expected to be completely soluble in aqueous solution. |
F |
T/F A 1.0 M solution of glucose is expected to have a greater boiling point than a 1.0 M solution of NaCl. |
F |
T/F The reaction, PCl5 - PCl3 + Cl2; Kc = 1.2 x 10-2, primarily will contain products at equilibrium |
F
Kc = Products Reactants |
T/F Increasing the temperature of an exothermic reaction will result in a greater amount of product at equilibrium. |
F
Exothermic - out (product) Enothermic - In (reactant) |
T/F Adding a catalyst to a reaction mixture will have no effect on the equilibrium constant |
T |
T/F An acid is a substance that ionizes in water to produce hydroxide ion. |
F hydronium |
T/F The pH of a 0.10 M solution of a weak acid is expected to have a pH greater than 1.0 |
T |
T/F An aqueous solution of KCl is expected to be slightly acidic |
F |
T/F The pH of a 0.10 M solution of NaOH is expected to be 1.0 |
F |
