Aforce of 200 n is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. how much power is being expended to maintain this motion?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?