2 moles of propane reacts with 8 moles of oxygen in a combustion reaction. How many moles of carbon dioxide are formed? How much of the excess reactant is left over?

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

there are two significant figures.

answer7,570,82356 cubic centimeters;