For the reaction C + 2H2 – CH4, how many grams of hydrogen are required to produce 19.5 moles of methane, CH4?
PLEASE HURRY I NEED HELP IM GONNA GAIL CHEM

100 points answer quick 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.

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

What is bromine+calcium iodide--> calcium bromide +iodine balanced