6. Chemical Quantities & Aqueous Reactions

In which of the following species does nitrogen have an oxidation number of zero?

What is the oxidation number of nitrogen in NH_3?

What is the oxidation state of an individual sulfur atom in MgSO_4?

How many unpaired electrons are present in the complex ion [FeCl_6]^{4-}?

Which of the following particles are lost by an atom during the oxidation process?

What is the oxidation number of carbon in CO?

What is the oxidation number of Fe in Fe_2O_3?

In the reaction Zn + 2 H^+ → Zn^{2+} + H_2, what is the oxidizing agent?

In the reaction Fe2O3 + 3CO → 2Fe + 3CO2, which element is oxidized?

An unknown weak base has a concentration of 0.170 M and a pH of 9.42. What is the value of K_b for this base?

What is the oxidation state of iron in the compound Fe2O3?

In which of the following reactions does the oxidation number of oxygen increase?

What is the oxidation state of nitrogen in N_2O_5?

What is the oxidation number of the carbon atom in carbon monoxide (CO)?

Which of the following rules for assigning oxidation numbers is correct?