Chemistry General Test

Question 1

Consider the following equation:
C8H14 + 2 H2 –> C8H18

Are exactly 2 grams of H2 needed to react fully with exactly 1 gram of C8H14?

Answer 1

No. 1 gram of something is not the same as 1 mole of something.

• The balanced chemical equation gives us information directly about ratios of molecules and/or moles. IT DOES NOT GIVE US DIRECT INFORMATION ABOUT MASS. To find the mass, use stoichiometry.