Final answer:
In 19 molecules of benzene (C6H6), there are a total of 114 carbon atoms, as each molecule contains 6 carbon atoms.
Step-by-step explanation:
To determine how many carbon atoms are in 19 molecules of benzene, C6H6, we need to consider the molecular formula of benzene. Each molecule of benzene contains 6 carbon atoms because the '6' in the formula C6H6 indicates there are 6 carbon atoms in each molecule of benzene. To find the total number of carbon atoms in 19 molecules, we multiply the number of carbon atoms in one molecule (6) by the number of molecules (19).
6 carbon atoms/molecule × 19 molecules = 114 carbon atoms.
Therefore, the answer is (b) 114 carbon atoms in 19 molecules of benzene.