There are a few ways to increase the rate of a reaction. What is altered when the amount of a substance in a given volume is increased? temperature
concentration
surface area
pressure

Compare and contrast physical changes with chemical changes.

Summarize possible ways in which phases of matter could combine to form a solution.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.