In a fuel cell: a. the oxidizing and reducing agents are initially present and get used up, then the cell is disposed of b. the cell can be recharged by supplying electricity c. the oxidizing and reducing agents are continuously supplied and the cell can continuously produce electricity electricity is supplied to the cell and metal ions are plated out onto a surface d.

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the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.