The standard heat of formation of B2O3(s) is -1263.6 kJ/mol and the standard heat of formation of liquid water is -285.8 kJ/mol. Use the information below to find the standard heat of formation for one mole of B5H9. B5H9(l) + 12 O2(g) 5 B2O3(s) + 9 H2O(l) Horxn = -9036.6 kJ

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

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