I messed up in the lab a week or so ago, and was unable to do the lab properly. There was no time to restart so I am missing a crucial piece of data. I need to know the mass of my calorimeter + the mass of a solution. I know the mass of the calorimeter, and I know the mass of the first component of the solution from an earlier step. All I need to know now is how much mass 50 ml of 2.00 mol/L Hydrochloric acid is in grams. I calculated that there would be 3.6 grams of HCl in the 50 ml so Is there any way to find out the volume of 3.6 grams of HCl now. I would know that the rest is water and be able to calculate its mass. Can someone who has a lot of experience maybe estimate the mass that would be fine aswell. If worse comes to worse I'll just estimate that it weighs 60 grams. Does this sound reasonable? Thanks.