The ksp for caf2 is 3.9 x 10-11 at 25oc. what is the solubility? a. 4.1 x 10-3 molar b. 3.9 x 10-3 molar c. 2.1 x 10-4 molar d. 4.1 x 10-4 molar e. 3.9 x 10-11 molar

We have to know the solubility of CaF₂.

The solubility of CaF₂ is: (c) 2.1 x 10-4 Molar

The general expression of solubility product of any sparingly soluble salt (having solubility S) with formula is: .

For the compound, CaF₂, x=1, y=2 So, ==4S³= 3.9 x 10-11  (Given)

S³=

S³=9.75  X

S= 2.1 X Molar

idk

explanation:

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.