Please help which one is it

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

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

Draw the structure for 5-isopropyl-2-methyl-3-nonene