What is the volume, in liters, of 2.8 moles of no2 gas at stp?

The answer for #3 is c but i don't know why

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed