Sand filters used in drinking water treatment can accumulate manganese oxides (MnO2) as a result of biological oxidation of dissolved Mn(II) in the water. MnO2 has a very low solubility. The Mn(II)-oxidizing bateria use oxygon to oxidize Mn(II). (a) Write the two half reactions and the whole redox reaction for the oxidation of Mn(II) by dissolved oxygen at pH 7. (9 points) (b) Identify the oxidant and reductant for this redox reaction. (6 points) (c) Estimate the energy for this redox reaction. Is it favorable or unfavorable

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

Listenbase your answer to the question on the information below. nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body. cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment. which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that