12. Which of the following is a single replacement reaction?
A. 4Al(s) + 3O2(g) > 2Al2O3(s)
B. 2C4H10(g) + 13O (g) > 8CO2(g) + 10H2O(g)
C. CaCo3(s) > CaO(s)+ CO2(g)
D. Mg(s) + 2HCl(aq) > H2(g) + MgCl2 (aq)

How much energy is made when a pice of wood burns. how do you know

List the path of the respiratory system

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