During an experiment, jon exhales through a straw and blows bubbles into a solution. which observation would most likely indicate that a chemical reaction is occurring?

the bubbles disappear into the solution before reaching the surface.
the gas forms a layer above the surface of the solution.
the solution becomes very stirred up by the bubbles.
the solution becomes cloudy with a white solid.

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.

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.