PLEASE HELP!
what are the steps that occur during the combustion of hydrogen?

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.