Answer
$$5.261*10^{21} molecules$$
Work Step by Step
We solve to find:
$$ \frac{.280 g}{1}* \frac{1 mol}{194.12 g}* \frac{8 mol \ C \ atoms}{mol} \frac{6.022*10^{23} molecules}{mol \ C \ atoms}=5.261*10^{21} molecules$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.