3. A student uses 0.082g of Mg and collects 85.2mLH2(g) over water at 23.1C on a dav when the atmospheric pressure is 766.9mmHg The lavel ff whtn+ in the crecinm eter tube is 18.4mm above the water level in the beaker. What value of R does the student obtain? Please be sure your value of R is expressed with units and the correct number of significant figures and that the necessary corrections are made for the = pressure of H2. (.390476atm)(.0552LH2)=(.003374486malMb)(K)(29alk)R=.033295681molkLamm (4) Explain why it is necessain to make sne the H2O level indide the evdiometer is the same ow the H2O level atide. 113