How many moles of oxygen are needed to produce 15.0 liters of carbon dioxide? Plz help ASAP

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?

How do you determine the percent yield of a chemical reaction

If an atom has 12 protons and 13 neutrons