A 47 kg rock falls freely near the surface of the Earth. Approximately how much gravitational force is exerted by the Earth on the rock?*
1 point
4700 N
470 N
47 N
4.7 N
nuntor clier is nulled by a net force of 138 N and has an acceleration of 2.3 1 point

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

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?