In studying layers of rock sediment, a geologist found an area where older rock was layered on top of younger rock which beat explains how this occurred

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

Is powdered sports drink ionic or covalent ? 10pts !