Study the reaction. Zn+Cu2+→Zn2++Cu
According to the reaction, which of these are true?
Select three that apply.
Zn loses electrons and is oxidized to Zn2+.
Cu2+ is the reducing agent.
Cu2+ loses electrons and is oxidized to Cu.
Zn2+ is the reducing agent.
Zn gains electrons and is reduced to Zn2+.
Cu2+ gains electrons and is reduced to Cu.
Zn2+ is the reducing agent.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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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.