The formula weight (FW) of a gas may be determined using the ideal gas law: FW = mRT/PV

where m is the mass of the gas sample in grams, R is the universal gas constant, T is the absolute temperature, P is the gas pressure in atmospheres, and V is the gas volume in liters. In a typical analysis, the following data are obtained (with estimated uncertainties):

m = (0.146 plus or minus0.002) g, R = (0.082056 plus or minus 0.000001) (Latm)/(Kmol) , T = (298.5 plus or minus 0.1) K, P = (0.731 plus or minus 0.003) atm

Using spreadsheet,

(a) find the FW of the gas using the provided values of m, R, T, and P.

(b) By propagation, find the absolute uncertainty for the FW MEAN= 0.247, STANDARD DEVIATION=0.00378

(c) Report the final result for FW as (mean abs. uncertainty), with proper number of significant figures.