July 13, 2013

How much did you pay for your tattoo?

I have 3 picked and i know where they are going. Yes i am going to ask the artist i am just asking to see what other people paid. What is your tattoo of? Where did you get it? And how much did you pay? The # 1 I’m getting is a cross on my right arm. About 6″x10“.

I have two. The skeleton girl on my arm cost \$120 and 3 numbers on my chest in small lettering cost \$60

What is the concentration of OH ions in the solution?

In a given solution of Ca(OH)2, the Ksp was found to be 7.3 x10^-17. If the Ca was .3 M – what is the concentration of the OH ions in the solution?

Ca(OH)2 Ca+2 and 2 OH^-

Ksp = [Ca][OH^-]^2 = 7.3 X 10^-17. If x is dissolved Ca, then dissolved OH is 2x, and
7.3 X 10^-17 = x (2x)^2 so that 4x^3 = 7.3 X 10 ^-17
x^3 = 1.835 X 10^-17
and x = 2.5367 X10^-6

Now if [Ca] is 0.3, it must have been introduced by a souble Ca salt – something like CaCl2 for example

In that case 7.3 X 10^-17 = (0.3 +x)(2x)^-2

x for Ca will be small compared to 0.3 and can be ignored,
x for OH will be as shown, and we can write:

0.3 X 4x^2 = 7.3 X 10^-17
4x^2 will be 7.3 X 10^-17/0.3 = 2.433 X10^-16
x^2 will be 6.08333 ^ 10^-17
and x = [OH] will be the square root:7.7995 X 10^-9 Molar

Hope that helps,

Doc

How do I get rid of acne residual color?

Okay, so A few months back my skin broke out really bad. I went to the derm. and she gave me Aczone, Differin, glycolic acid cleanser, and Aveeno daily moisturizer. They’ve cleared me up very nicely, but the old scarring is still there. I find it frustrating because the scars pretty much look like flat pimples.

My derm. said we’d probably do peel on my skin. I have really pale skin in general, so all these scars are x10 noticeable.

I think to get rid of discoloration you should try these two things:

- Saline solution
- Witch Hazel

Not foolproof, but effective.

What is a good camera to get?

Between the Cassio ES-X10 and the Cannon Powershot, I’m trying to figure out what type of camera to get. I know someone who has the Cannon Powershot and it works well, but the Cassio got better reviews. I want one that takes good pictures, but I also want it to take the pictures quickly.

Please tell me which you would suggest!

You can follow the reviews, but in general as long as you buy a name brand camera, with at least a 3x zoom, uses SD or SDHC memory card and has IS, you should be fine.

Look for cameras listed on http://www.dpreview.com and then look at the reviews for the cameras you like.

My photo rep has a Casio and loves it. He makes YouTube videos with it too.

How can i deny/block the internet access that apps have?

I bought an xperia x10 mini before some days and when i install (android) applications they have access to the internet.Anyone who knows what should i do? Can you suggest me a program for my android that denies internet access? I tried to find something that blocks the access but nothing… :

Find a good firewall. Here are some links to reviews of Android firewalls:

http://www.pandaapp.com/pandafirewall/android/

There may be more out there too.

Calculate the concentration of acetic acid not ionized in the solution obtained?

By dissolving 5,00 x10 ^ -2 mol of acetic acid (CH3COOH) in water, to a total volume of solution equal to 0.500 dm ^ 3, gives a solution whose pH is equal to 2.88 at 25 ° C.
Calculate the concentration of acetic acid not ionized in the solution obtained.

Initial Concentration of acid c1
c1=n(acid)/V
c1=5*10^-2/0,5 =0,01 moldm-3
Now, we can calculate conc of dissolved ions
c=10^-pH
c=0,0013 moldm-3
That’s conc of H3O+ ions. Therefor, conc of acid that haven’t ionized is
c1-c=0,0987 moldm-3

How to calculate viscosity of water at room temperature given mass and specific gravity?

I don’t know how to solve this problem statement because I’m new to this subject. It is given mass of water, 10 kg, the absolute viscosity 0.89 (N.s/m2)x10^-3, 1.9(Ibf.s/ft2)x10^5 and a surface tension of 71.97(N/m)x10^3
How to calculate the viscosity of water by using these data?
How to find the fluid compressibility?