How do the coefficients in a balanced equation compare quantities of two substances?
A. The sum of the coefficients of the reactants equals the sum of the
products.
O B. The ratio of the coefficients equals the ratio of the masses of the
substances.
C. The coefficient of the reactant tells how many product molecules
will form.
D. The ratio of the substances' coefficients equals the ratio of their
number of moles

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which type of fossil does this image depict?

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?