A sample of crude oil contains 3.09 mM naphthalene, 10.0 mM methylnaphthalene, 23.2 mM dimethylnaphthalene, and 14.4 mM trimethylnaphthalene. What is the total number of moles of all naphthalene compounds combined in 100.0 mL of the oil

0.00507 moles

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

where,

n = moles of solute

= volume of solution in ml

1. moles of napthalene =

2. moles of methyl napthalene =

3. moles of dimethyl napthalene =

4. moles of trimethyl napthalene =

Thus total moles of all naphthalene compounds combined is (0.000309+0.001+0.00232+0.00144) = 0.00507.

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