How does the value of ka and kb compare with the concentrations of hydronium ion and hydroxide ion?
ka x kb= [h3o+][oh-]
ka x kb> [h3o+][oh-]
ka x kb< [h3o+]+[oh-]
ka x kb+ [h3o]/[oh-]

The correct answer is A, Ka × Kb = [H₃0⁺][OH⁻]

I hope this helps, have a good day and good luck! :)

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.