If I have a sample and it’s 0.10M at 500nm what is the absorbance

Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Ok, so i have 2 questions. try to answer them both: (the topic is fire) 1) how can you represent the chemical reaction of fire? 2) what kind of bond is formed in this chemical reaction