Jim

What is the final potential difference across the 30uf capacitor?

Force on the satellite by the planet?

Please show work and explain

Thanks

I have a 2014 black truck. It is maybe about 8 months old now. I live in the south. So we don't get snow just cold weather for the most part. I have only washed my truck since getting it. It has no scratches or anything. I was thinking of just using Meguiars since that is what I have always used but never used it on a black vehicle before. What are your thoughts and opinions. FYI I care more about shine. If I have to redo the max every month or so it isn't a big deal. Just want the car to shine bright. Should I clay bar it also?

Thanks

volume of 2.8 L to a final volume of 4.2 L.

No idea how to solve.

Thanks

Thanks

Calculate the solubility of Barium Sulphate in water.

Ksp = 8.7 x 10^-11

So would the equation be Na2SO4 (s) = 2Na1+ (aq) + SO4 1- (aq)

Ksp = [Na1+]^2[SO4 1-]

8.7 x 10 ^-11 = [x]^2[x]

Is that correct or should it just be [x][x]??

Thanks

Please show work

A solution is made by dissolving 15.0g of (NH3OH+)Cl in 100 mL of a 1.5 M NH2OH solution.

I got a pH of 8.11 but i do not feel like i did the problem right.

NH2OH + H2O = NH3OH+ + H3O

so i made an ice table after that and used the kb for NH2OH.

Please explain how to do the problem.

Also could i have used pH = kpa + log (base/acid)??

thanks

Calculate the pH of a solution made by adding 30 g of HF to 300 mL of .23 M KF.

How do I tell how the equation will go and in which direction? And using Ka or Kb.

Here are two examples

- a solution made by adding 30 g of HF to 300 ml of .23 M KF

Is the equation

HF + H2O = F - + H3O (ka?)

or

F- + H3O = HF + H2O (kb?)

- a solution is made by dissolving 15 g of (NH3OH+)Cl in 100 ml of a 1.5 M NH2OH solution.

Is the equation

NH2OH + H2O = NH3OH + H3O (ka?)

or

NH3OH + H3O = NH2OH + H2O (kb?)

Thank you. Please explain. Lost

Calculate the pH of a solution made by adding 30 g of HF to 300 mL of .23 M KF.

I converted g to mole and got the M of 5. And then found the kPa of HF by using the ka. And then used the equation. But I wanted to see other people's work.

Thanks

N2 (g) + O2 (g) = 2NO

If i have .2 mol of O2 and .8 mol of N2 into a flask at a total pressure of 1 atm. Calcuate the partial pressure of NO at equilibrium.

Kp = .050

How do I get the inital concentration from these numbers??

Please show work.

N2 (g) + O2 (g) = 2NO

If i have .2 mol of O2 and .8 mol of N2 into a flask at a total pressure of 1 atm. Calcuate the partial pressure of NO at equilibrium.

Kp = .050

I do not know how to get the initial for the ICE table.

CO + H2 = CH4 + H2O

Becomes

CO (g) + 3H2 (g) = CH4 (g) + H2O (g)

If the initial concentration of CO is .100 M and the initial concentration of H2 is .300 M. What is the equilibrium concentration of all species?

K = .1764

.1764 = (x^2) / (.1-x) (.3-3x)^3

I'm struggling with the algebra to get rid of the ^3 on the bottom. I factored everything out. But I didn't know where to turn from there.

Thank you.

.1764 = (x^2) / (.027 - .81x + 8.1x^2 -27x^3)

Please show wok. Would like to follow to understand.