On a day a piece of lithium metal was added to a flask of water when the atmospheric pressure was 75.7 Torr. The lithium reacted totally with the water to form the 250mL of hydrogen gas, at 23 degrees C collected over the water, at which temperature the vapor pressure of water is 21.07 Torr.
1. Calculate the partial pressure of hydrogen in the collection flask?
2. Determine what mass of lithium metal reacted?