Sodium nitrite ion is a preservative used in the curing of meat, but is potentially carcinogenic. nitrite concentrations are commonly determined using the griess reaction. in this reaction, the sample containing nitrite is reacted with sulfanilamide and n-(1-naphthyl)ethylenediamine to form a colored species that absorbs at 550 nm. 50.0 ml of a food extract known to contain no nitrite had a percent transmittance of 78.35%. 50.0 ml of a food extract with a known concentration of 1.25  10–5 m no2 –had a percent transmittance of 9.38%. 50.0 ml of a food extract with an unknown amount of nitrite had a percent transmittance of 18.84%. how many micrograms of nitrite, no2 – (fm: 46.01 g/mol), are present in the 50.0 ml of food extract containing an unknown amount of nitrite?