This is my data:
R = PV/nT
P=0.8914atm (the pressure of the atmosphere minus the water pressure)
V=0.03999L (volume of water displaced)
n=1.4x10^-2 (I found the number of moles of NaNO2 and acid, then added them. Maybe this is where I went wrong?)
T= 292.7K (temperature of the water)
The reaction involved NaNO2 and sulfamic acid, which react to produce nitrogen gas and some other junk. We had to assume the temperature of the nitrogen was the same as the water, and the volume of nitrogen was the volume of the water displaced.
I get an R value of 0.008699079L atm / mol k. Shouldn't it be near 0.082057? Somethings wonky.