4. Balance the following equations (show work) a.___H2(g) +___O2(g) →___H2O(1)

b._Fe(s) +___O2(g)→___Fe2O3(s)

c.___Al(s) +___HCl(aq) →___AlCl3(aq) +___H2(g)

d._CaCO3(s) +_HCl(aq) →_CaCl2(aq) +_CO2(g) +_H2O(1)

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d