Which of the following is the best reason for using a scanning electron microscope?
a. ability to magnify objects that are larger than 0.2 micrometers
b. ability to observe live organisms
c. ability to see three-dimensional images of the surfaces of objects
d. ability to see movement within living cells

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air