Acid is added to a beaker containing crushed marble. what effect does stirring this mixture have on the system?
the surface area of the particles increases
the number of particle collisions increases
the energy of the collisions increases

The arrangement of particles is most ordered in a sample of

The characteristics 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 an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.