Answer: The moles of nitrogen dioxide produced are 96.3
Step-by-step explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
of particles.
To calculate the moles, we use the equation:

According to stoichiometry:
7 moles of oxygen
produce = 4 moles of nitrogen dioxide
Thus 168.5 moles of oxygen
will produce =
moles of nitrogen dioxide