Endothermic and exothermic chemical reactions can be illustrated with simple graphs, like the one shown below, which represents the following chemical equation: CH4 + 202 --> CO2 + 2H2O Use the graph provided to complete the questions that follow. c+ 20 ENERGY co + 2,0 TINE redict what would happen to the graph if an enzyme was added to this chemical action. (1)

Which statement about the stamps is correct?

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?

Match the formula for the following compound:   magnesium sulfate heptahydratemgs·7h2omg2so4·7h2omg(so4)2·7h2omgso4·7h2o