Answer
$$1.796*10^{21} atoms$$
Work Step by Step
To solve this problem, find the molar mass of each substance, which is listed on the periodic table. Then, use a conversion to solve for the amount of the given substance:
$$ \frac{.2480 g}{1}* \frac{1 mol}{166.22 g}* \frac{6.022*10^{23} molecules}{mol}* \frac{2 \ N \ atoms}{molecule}=1.796*10^{21} atoms$$
