A sample of dinitrogen tetroxide (N204) gas occupies 144 L at STP. How many moles of nitrogen atoms are present in this
sample?
moles
Your answer should be rounded to three significant figures. Do not include units
in your answer.

In saturated organic compounds, all the bonds between carbon atoms are called?

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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.