Formic acid, hcooh, is a weak acid present in the venom of red-ants. at equilibrium, [hcooh] = 2.00 m, [hcoo− ] = 4.0 × 10− 1 m, and [h3o+ ] = 9.0 × 10− 4 m.

a. write the equilibrium expression for the ionization

See below  

Explanation:

The general formula for an equilibrium constant expression is

For this reaction,  

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.