# chem

posted by Anonymous

The experiment described in the procedure was performed using a sample of Calcium with HCl(aq).
The lab conditions were 25.00°C, and 747.0 torr barometric pressure. 112.7 mg of Calcium (MM: 40.08 g/mol) was reacted with 25.00 mL of 1.25M HCl(aq). 71.560g of water was collected when the reaction was complete, and it required 34.53mL of 0.750M NaOH(aq) to titrate the reaction mixture.
Water at 25.00°C has a density of 0.9970 g/cm3, and a vapor pressure of 23.80 torr.
The value for R is 0.082058 L•atm/mol•K.

How many moles of H2 gas are generated?

I know you use the ideal gas law but im really confused as to what pieces of information I plug in.

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