For the following word equations, write it as a chemical equation, then balance it. copper (II) oxide + hydrogen gas copper + water

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.