Answer:6.241
Explanation :Step 1: List the known quantities and plan the problem.
Step 2: Solve. n=PVRT=0.987atm×0.677L0.08206L⋅atm/K⋅mol×296K=0.0275mol. Now divide g by mol to get the molar mass. ...
Step 3: Think about your result. The R value that corresponds to a pressure in atm was chosen for this problem.