advanced study assignment (asa) a student reacts a 0.050g sample of magnesium in excess hydrochloric acid in order to produce hydrogen gas collected at room temperature (23.2°c). 48.6 ml hydrogen gas is collected in an eudiometer tube with water initially at 20.0°c. 1. how many moles of magnesium are reacted? moles of magnesium reacted: 2. from the balanced chemical equation, how many moles of hydrogen gas are created? moles of hydrogen gas created: 3. if the pressure inside the eudiometer tube is equalized to atmospheric pressure (1.00 atm), what is the pressure of only the hydrogen gas in the tube (without water vapor)? pressure of hydrogen gas only: 4. considering that this reaction was not performed at stp, calculate the volume of hydrogen gas that would have been produced at stp. (hint: use equation 1) volume of hydrogen gas at stp: 5. using the information you calculated, what is the molar volume at stp for hydrogen gas? molar volume of hydrogen gas: 6. given the known molar volume of an ideal gas at stp, calculate the percent error in your experiment. percent error: