The total bonding energy for the products of a reaction is 1230 kJ/mol and the bonding energy of the reactants is 565 kJ/mol. Calculate the change in enthalpy, and classify the reaction as endothermig or exothermic. -665 kJ/mol, endothermic
665 kJ/mol, exothermic
-665 kJ/mol, exothermic
665 kJ/mol, endothermic

9. write the chemical equation for the following word equations. include symbols for physical states in the equation. a. solid zinc sulfide + oxygen gas -> solid zinc oxide + sulfur dioxide gas b. aqueous hydrochloric acid + aqueous barium hydroxide -> aqueous barium chloride + water

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?