For the following information I have of my lab, when I use the formula PV=nRT, which value for R(universal gas constant) should I use?

8.314472 J·K-1·mol-1 or 0.0820574587 L·atm·K-1·mol-1?

Why is this?

The Lab:

I have collected oxygen gas by the downward displacement of water (results are in the last column). This oxygen was produced in the first 60 s of the reaction.

Calculate the number of mols of oxygen gas produced per second

Remember PV=nRT and that you must account for the partial pressure of water vapour

The reactions conditions are:

Atmospheric pressue:102.6 kPa;

Temperature:290 K

Partial pressure of water vapour:1.94 kPa.

The reaction is:

Volume of 6% H2O2 (mL):10.0

Volume of distilled water (mL):0.0

Volume of 1.0 M NaI (mL):10.0

Volume of distilled water (mL):0.0

O2 production in 60 s (mL):151.0