Consider the voltaic cell: Mg Mg2+ (1.0 M)||H* (1.0 M)|H₂ (1 atm)|Pt(s) Which of the following changes will cause a decrease in the cell voltage? O increase the pressure of H₂ at 2.0 atm O decrease the mass of the Mg electrode O decrease the concentration of Mg2+ ion Olower the pH of the catholyte

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