Propane has the formula c3h8. if a sample of propane contains 0.20 moles of c, how many moles of h are present?

Solving this problem only requires the knowledge of stoichiometry. We are given the compound propane C3H8. From the chemical formula, we can see that for every 3 moles of C, there are 8 moles of H. Therefore:

moles of H = 0.20 moles C * (8 moles H / 3 moles C)

moles of H = 0.53 moles H

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)