August 2018 NY Regents Chemistry Exam 25 Which value changes when a Cu atom becomes a Cu^2+ ion? (1) mass number (2) oxidation number...

January 2019 Ny Regents Chemistry Exam 47 What are the two oxidation states of nitrogen in NH4NO2? (1) +3 and +5 (2) +3 and -5 (3) -3 and...

January 2019 NY Regents Chemistry Exam 46 Given the balanced ionic equation representing a reaction: Zn(s) + Co^2+(aq) → Zn^2+(aq) +...

January 2019 NY Regents Chemisty Exam 45 Which half-reaction equation represents reduction? (1) Cu → Cu^2+ + 2e- (2) Cu^2+ + 2e- → Cu...

January 2019 NY Regents Chemistry Exam 25 Which metal is most easily oxidized? (1) Ag (2) Co (3) Cu (4) Mg Solution: On Table J on the...

August 2019 NY Regents Chemistry Exam 46 Given the equation representing a reaction: 2Ca(s) + O2(g) → 2CaO(s) During this reaction, each...

August 2019 NY Regents Chemistry Exam 25 Which statement describes the reactions in an electrochemical cell? (1) Oxidation occurs at the...

January 2020 NY Regents Chemistry Exam 46 Based on Table J, which metal is more active than tin, but less active than zinc? (1) Ag (2) Cr...

January 2020 Ny Regents Chemistry Exam 45 When comparing voltaic cells to electrolytic cells, oxidation occurs at the (1) anode in both...

January 2020 NY Regents Chemistry Exam 23 Which form of energy is converted to electrical energy in a voltaic cell? (1) chemical (2)...