How many grams of water are required to produce 5.00 l of hydrogen gas at 25.0°c and 755 mm hg pressure according to the chemical equation shown below? BaH₂(s) + 2 H₂O(l) → Ba(OH)₂(aq) + 2H₂(g)
a. 4.02 g
b. 4.07 g
c. 8.04 g
d. 2.01 g