In what direction do electrons flow spontaneously? between similarly-charged areas false between areas with different charges false from a positively-charged to a negatively-charged region false from a negatively-charged to a positively-charged region true Single Which of the following statements correctly define 'power?' power is energy per unit area false power is work done per unit time true power is the same as energy false power is energy multiplied by time false Single What is the oxidation state of the sodium ion, Na2+? 0 false +1 false +2 true -2 false Single Which of the following elements always has a +2 oxidation state in its compounds? Strontium true Oxygen false Carbon false Xenon false Single What is the oxidation state of chlorine in HCl? 0 false +1 false -1 true +2 false Single Which statement describes the role of a reducing agent in a redox reaction? The reducing agent gets reduced false The reducing agent gets oxidized true The reducing agent accepts electrons false The reducing agent serves as a spectator ion false Single Which of the chemical equations show an oxidation process? X → X₂₊ true Y → Y_3- false Z₂₊ → X₃- + Y₅₊ false X₃- + Y₅₊ → Z₂₊ false Single In the chemical equation X3+Y3- + A2- → A2+X2- + Y2-, which species underwent reduction? X only true Y only false X and Y false X and A false Single What are the characteristics of a balanced redox reaction? The reduction and oxidation half-reactions have zero net charges false The reduction and oxidation half-reactions have the same net charges false Its product and reactant sides have zero net charge and equal mass false Its product and reactant sides have the same net charge and mass true Single Which of the following half-reactions is properly charge-balanced? Mg₂₊ + e- → Mg₃₊ false Mg₂₊ → Mg₃₊ + e- true Mg₂₊ + e- → Mg₃₊ + e- false Mg₂₊ + 3e- → Mg₃₊ + 2e- false Single