Help me please Chemical energy is a form of energy

A. heat
B. kinetic
C. potential
D. electromagnetic

Is a pencil falling to the floor anon contact force, a force, or a contact force

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2

Which substance is a steroid? cholesterol fatty acid monosaccharide trans fat