Which statement about reaction rates is true? changing the amount of reactants will not change the reaction rate. changing the temperature cannot speed up a reaction rate. changing the surface area affects the reaction rate. a catalyst slows down the reaction rate.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.

Why do mountaineers become breathless as they reach high altitudes