How are meteorites and meteors different?

meteorites are found in space and meteors are not.
meteorites usually burn up in the atmosphere, but meteors do not.
meteorites are larger than meteors.
meteorites have struck the earth's surface, but meteors have not.

What is the empirical formula for c4h8o2

Determine the reaction and balance the following equations urgent due in the morning

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?