The pressure of the atmosphere is $2\times10^{-6}$ at about 100 mile above the earth and temperature is $-180^{\large\circ}C$ .How many mole are there in 1 mL gas at this altitude?

Question

$\begin{array}{1,1}(a)\;3.46\times10^{-10}mole\\(b)\;\;3.45\times10^{-13}mole\\(c)\;\;3.45\times10^{-9}mole\\(d)\;\;3.45 mole \end {array}$