wolfson

When saying "weak" base it does NOT mean the pH is weak (pH is only connected to the Molarity of a substance), a weak base is one which doesn't convert fully into hydroxide ions in solution, do not get confused try to remeber pH varies upon Molarity. Kb = [b:H+][OH-] / , If the question was relating to pKb the other considerations would need to come into affect. Hope you understand a little bit more now

your very welcome

Apatite is an example.

Oh didnt read that well, sulfuric acid extraction of a phosphate-rich rock will give you elemental phosphorus.

Ok try http://www.schlaganfall-sehstoerung.de/mechanics-science.htm

How about soil phosphorus extraction by iron oxide impregnated filter papers, since your into gradens....lol...

http://education.yahoo.com/reference/gray/197.html Hope thats ok, Gray was excellant at anatomy/pathology.

Question: Calculate the pH of 0.100 M sodium propanoate (NaC3H5O2)? Answer: Ok since this is a base (weak) you need to use Kw: Kw = 1.0e-14 (e = x10 which is exp) Step 1: pH of base = Molarity / Kw pH of sodium propanoate = 0.100M / 1.0e-14 (Kw) = 1e13 (the new molarity) Step 2: (Log) pH = Log(new molarity) pH = Log(1e13) = 13 pH of 0.100M of Sodium Propanoate is 13. If you need anymore help don’t hesitate to ask.

Alot of people in my area have 2 Stack 2 Bay Vertical array aerials.

MrL_JaKiri you need to calm down.

2 C4H10 + 13 O2 ==> 8 CO2 + 10 H2O

As an example: CH3COOH(aq) + H2O(l) <> H3O+(aq) + CH3CO2-(aq) Ka = [H3O+][CH3CO2-] / [CH3COOH] as for Ksp: MmXx(s) <> mMn+(aq) + xXy-(aq) Ksp = [Mn+]m[Xy-]x You need to transpose the Ksp as laid out to formulate the Ka, you should have all values. You should get a value of 6.28e-5.

B(n,p)) is characterized by two parameters n, the number of trials p, the probability of success number of ways k successes among n trials can occur C(n,k) = n!/(k!(n-k)!) Example Assume that 25% of fuses are defective, and the fuses in packages of six fuses are independently selected. What is the probability that (exactly) two fuses in a package of six are defective? C(6,2)=6!/(2!4!)=720/(2 × 24) = 15; 15 × .25^2 × .75^4 = .2966. What is the probability that fewer than two are defective? Fewer than two means 0 or 1. P(X=0)=C(6,0) × .25^0 × .75^6 = 1 × 1 × .1780 = .1780; P(X=1)=C(6,1) × .25^1 × .75^5 = 6 × .25 × .2373 = .3560. P(X=0 or 1) = .1780+.3560 = .5340. (APP2003)

I think as long as the element is in 1 molar quantity then they are "most" metalic, even if they do not pass electricity as good as another they still remain metallic.

ProductLog is another name for the Lambert W relation.

Why not try 3-cinnamalidene-acetylacetone?

Actually to solve x it would go: x = (a^a+1Log(a)/Productlog[a^a+1Log(a)])^a^a-1

The complex, semifluid, translucent substance that constitutes the living matter of plant and animal cells and manifests the essential life functions of a cell. Composed of proteins, fats, and other molecules suspended in water, it includes the nucleus and cytoplasm. APP (2002)

Hello again, Apply the Geometric Progression equation: tn = ar^n-1 a = first term, n = value as a integer and r = common ratio tn = 1*2^(36-1) = 3.436e10 3.436e10 / 4 = 8590000000 (into g’s) 8590000000 / 1000 = 8,590,000 (into kg’s) 8,590,000 x $1 = $8,590,000 (into $). That was for the rice, now for the gold: 75 x 1000 = 75000 (into kg) 75000 x $12 = $900,000. As you can clearly see the rice is worth more by $7690000, this is the way you set it and answer it, if you need anymore help JUST ASK, gl.

A bit more lol.

Scroll down.

Try: y= -xproductLog(-Log(x)/x)/Log(x) and x= -yproductLog(-Log(y)/y)/Log(y) It works for me.

MnO2 + 2H2O2 = O2 +2H2O + HEAT ENERGY as MnO2 is a catalyst, thus is non changed, and a collecting agent.

Give us somemore aommaster and ill concentrate just try and get the symbols right i.e ^ for square/power of, e for expo, ~ for approx eqal to.

Yes I think rhombus is correct, i missed the bit about all equal lengths, as for sum (even and uneven) i did get 50: 50(50+1)/2 - 50(50)/2 = 50 If you use them you get 50 just calculated wrong, as for the rest you missed out symbols so i didnt know where to go, and boat crossing long whifted to explain just said take it in turn LOL.