CHALLENGE A winch designed to be mounted on a truck, as shown in Figure 8, is advertised as being able
to exert a 6.8x103-N force and to develop a power of
0.30 kW. How long would it take the truck and the
winch to pull an object 15 m?

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?