Three substances are poured in a cylinder with different densities. Draw the cylinder with the three layers and identify the substance in each layer. The three substances(with their densities) are mercury (13.55 g/mL), ethyl alcohol (0.78 g/mL) and lead (11.4 g/mL).

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]

What overall charge must all compounds have

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients