El sodio metálico se oxida fácilmente formando el compuesto A, que reacciona con agua, formando el
compuesto B; el compuesto C reacciona con agua formando ácido sulfúrico. B reacciona con ácido sulfúrico formando el compuesto D y agua. Describa cada una de las reacciones químicas que se llevan
a cabo y ¿cuáles son los compuestos A, B, C y D respectivamente?

In an energy pyramid, which level has the most available energy?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided