Water is an incomplete combustion as water is still produced by carbon monoxide and carbon are produced instead of carbon dioxide.
Ka x Kb = Kw Kw = 1 x 10⁻¹⁴
(1.3 x 10⁻⁷) x Kb = 1 x 10⁻¹⁴
Kb = ( 1 x 10⁻¹⁴ ) / ( 1.3 x 10⁻⁷)
Kb = 7.7 x 10⁻⁸
Answer D
hope this helps!
C i think i got this off of usa test prep in class
So they stay together but can open to allow boats through.