You could not tell since it would be hard to focus on the vibrations of the car.
Reactants are on the left side of the arrow, while products are on the right
(99.63/100 x 14.003) + (0.37/100 x 15)
13.9511889 + 0.0555 = 14.0066889amu
13.95 + 0.0555 = 14.0055 (same thing just rounded numbers)
(You can round that to 14amu)
Answer is 14 amu
Multiply them, then add total.
C 6 * 12.01 =
H 12 * 1.01 =
O 6 * 16.0 =
+ ------------
molar mass =
Add them together to get molar mass
D. The kilogram is a unit of mass.