6. Chemical Quantities & Aqueous Reactions

H_2 (g) can be oxidized by which of the following?

In redox reactions, why is the term 'reduction' used to describe the gain of electrons by a species?

Rust will form on an iron nail when which of the following has occurred?

Redox reactions involve the gain or loss of _____.

In the following redox reaction: Cr2O7^{2-} + 3 HNO2 + 5 H^+ → 2 Cr^{3+} + 3 NO3^- + 4 H2O, which substance acts as the reducing agent?

Which of the following is an example of reduction (as defined by a decrease in oxidation number)?

Which of the following reactions results in the oxidation of sulfur?

Which of the following is an oxidation-reduction (redox) reaction?

In the reaction cu(s) + ag^+(aq) → cu^+(aq) + ag(s), which metal is being oxidized?

In the context of redox reactions, what molecule is the final electron acceptor at the end of the electron transport chain?

Which one of the following is NOT a redox reaction?

Which of the following reactions is a combination redox reaction?

Classify the transformation of Fe^{3+} to Fe^{2+} as reduction, oxidation, or neither.

Which of the following is an electron carrier in its reduced form?

Which of the following reactions would be classified as an oxidation-reduction (redox) reaction?