I wont to know hw to separate iron and sulphur mixture when is heated

Which is not part of the definition of a family? two or more related people living together being married or in a partnership a single person living alone choices a and b

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays

The next best alternative given up when making a choice is called the a. opportunity cost b. comparative advantage c. primary objective d. negative consequence select the best answer from the choices provided. a b c d