Final answer:
There are 3.00 moles of hydrogen atoms in 0.500 mole of C2H6, as each molecule of C2H6 contains 6 hydrogen atoms.
Step-by-step explanation:
To determine how many moles of hydrogen there are in 0.500 mole of C2H6, we need to look at the molecular formula. Each molecule of C2H6, which is ethane, contains 6 hydrogen atoms. Therefore, for every mole of C2H6, there are 6 moles of hydrogen atoms. Using this stoichiometric relationship, we can calculate that 0.500 mole of C2H6 contains 0.500 moles × 6 = 3.00 moles of hydrogen atoms.