Consider the reaction 2H2(g) + O2(g) → 2H2O(g). The following bond energies have been determined experimentally:
H-H 436 kJ/mol
O=O 497 kJ/mol
H-O 464 kJ/mol
Suppose we start with 4 mol of hydrogen and end up with 4 mol of H2O.
If the system was at 300 K before the reaction took place, what is the final temperature after the reaction?

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

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 are isotopes of the same chemical element alike? how are they different?