Almost all of the oxygen on the planet earth is found in the atmosphere. is this statement true or false

False. this is because, Earth's atmosphere, which is thick, is mainly made of nitrogen and oxygen!!

hope this really helps!

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

im not exactly sure but i think its b!