Calculate the stoichiometric quantity of ammonia $($in kg$/$min$)$ required to reduce NOx emissions in a flue gas stream from $1000$ ppm to $300$ ppm$.$ The flow rate of the flue gas is $12000$ m$3/$min at conditions of $300\backslash$deg C and $1$ atm. Additionally, the NOx to be treated consists of $90\%$ NO and $10\%$ NO$2.$ The molecular weight of ammonia is $17$ kg$/$kmol$.$