Select the correct answer.
how does activation energy affect a chemical reaction?
oa it increases the energy of the reactants.
ob. it determines how difficult it is to start the reaction.
oc it determines how much product can form.
od. it decreases the energy of the products.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.

This statement about matter and its behavior is best classified as a