A d1 octahedral complex is found to absorb visible light, with the absorption maximum occurring at 509 nm. calculate the crystal-field splitting energy, δ , in kj/mol.

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)

The answer is c) pyrite

08.01 hope this and can i get brainlist? ?

Answer the same molecular formula;