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Which of the following samples has the most entropy? - all are the same bc they are all hydrogen -1 mol hydrogen gas -1 mol solid hydrogen -1 mol liquid hydrogen
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1 mol hydrogen gas
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If 3 moles of a substance are dissolved in 500 mL (0.5L) of solution, the molarity of this solution is-3.5M-1.5M-3M-6M
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6M
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In an acidic solution..-[H3O+] equals [OH-]-[H3O+] greater then [OH-]-[OH-] is greater then [H3O+]-none of these
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[H3O+] is greater than [OH-]
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How many atoms are represented in the formula Ca3(PO4)2
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13
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Chlorofluorocarbons, such as CCl2F2, can cause problems in the upper atmosphere by destroying..
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Ozone
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What is the weight of one mole of water molecules, H2O? The atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16.
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18 g H2O
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Which is the weak acid?-H2SO4-HNO3-HCl-HC2H3O2
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HC2H3O2
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For the equation H2(g)+Cl2(g)-->2HCl(g), which statement is false?-1 mol of Cl2 is a reactant-4 grams of H2 reacts with 1 mol of Cl2-2 molecules of HCl are formed-the sum of the coefficients of the reactants is 2
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4 grams of H2 reacts with 1 mol of Cl2
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A buffer is a mixture that....
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Maintains pH
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What is the pH for a solution with hydrogen ion molarity of 0.01?
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2
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What substance is found in corrosive cleaners?-acetic acid-sodium hydroxide-hydrochloric acid-sulfuric acid
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Sodium hydroxide NaOH
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A catalyst speeds up a reaction rate because it
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Provides an alternate lower energy pathway
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Which equation represents a neutralization reaction-HCl+H2O--->H3O+(aq)+Cl-(aq)-H+(aq)+OH-(aq)-->H2O
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-H+(aq)+OH-(aq)-->H2O
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Which of the following is associated with stomach fluid?-H3PO4-HCl-H3PO4-HNO3
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HCl
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Which is necessary for a chemical reaction to occur?-reactant molecules must collide-collisions must be of a certain energy-neither-both
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Bothreactant molecules must collide and collisions must be of a certain energy
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