A 1.90 g sample of elemental sodium, Na(s) is reacted with water, yielding sodium
hydroxide, NaOH, and hydrogen. 2Na(s) + 2H2O(l)→ 2NaOH(aq) + H2(g); The H2(g) is collected
over water at 18 oC. What are the partial pressures of the two gases (hydrogen and water
vapor) when contained in a 1.00 l container at 25
oC? What is the total pressure?