Science & Mathematics - 1 August 2007

Given: [NaOH] = 0.100 M
pKa = 4.60
Ka = 2.50 x 10^ -5
Vol. of NaOH to reach Equivalence = 9.7 mL
Vol. of NaOH to reach 1/2 Equivalence = 4.85 mL

Question:

1. Calculate the concentration (M), of the diluted acetic acid solution?

2. Calculate the concentration of the original acetic acid solution?

Help!

2007-08-01 11:19:27 · 1 answers · asked by cbrice9 1 in Chemistry

by gemstones i mean semiprecious stones and precious stones.

2007-08-01 11:18:04 · 9 answers · asked by ryan p 1 in Earth Sciences & Geology

cauze.................. I WANT TO FLY OUT OF EARTH!!!!

2007-08-01 11:17:07 · 11 answers · asked by Li 2 in Astronomy & Space

x^2=20

x^2+3x+12

2x^2+4x-3=0

2007-08-01 11:14:38 · 3 answers · asked by Anonymous in Mathematics

i tried doing it but it didnt work

2007-08-01 11:13:20 · 4 answers · asked by Anonymous in Engineering

2007-08-01 11:12:16 · 7 answers · asked by Anonymous in Mathematics

I just wanted to say the saying I made up about global Warming. Please think about it and think about what you can do.
Thanks

2007-08-01 11:11:51 · 4 answers · asked by Lindsalei 2 in Astronomy & Space

i.e. Is the set of all sets that are not members of themselves a member of itself?

2007-08-01 11:11:41 · 3 answers · asked by Anonymous in Mathematics

I need to write a test case to test three lines to determine if they form a valid triangle and what type of triangle they form. Is there a simple math algorithm/s which can be used for these tests?

2007-08-01 11:11:40 · 1 answers · asked by Ralph 7 in Other - Science

Darwin’s argument for the idea that evolution has occurred is largely inductive, while his argument for the mechanism of natural selection is essentially deductive. Summarize in your own words the inductive and deductive components of Darwin’s theory.

2007-08-01 11:06:08 · 1 answers · asked by Wanda McAlias 2 in Biology

Find
a) Total distance skier jumped
b) velocity when she landed

full solution please

2007-08-01 11:05:32 · 2 answers · asked by Anonymous in Physics

I'd like some hep with this prof, please, I'm rather confused.

In a sample space, let E_n be a sequence of events, each one with probability p(E_n). Suppose the series Sum(n =1, oo) p(E_n) converges a let E = {infinitely many events E_n occur}. Show that p(E) = 0.

Thank you

2007-08-01 11:04:38 · 3 answers · asked by Marcos 1 in Mathematics

I saw this on tomorrows world in the 80's never heard of it again did the government kill him

2007-08-01 11:02:36 · 15 answers · asked by GARY I 3 in Engineering

I'm sorry I didn't have many characters to work with. but I've been dreaming about an actual space travel simulator.

2007-08-01 11:02:17 · 6 answers · asked by lord_andys_new_id 1 in Astronomy & Space

2007-08-01 11:01:28 · 6 answers · asked by Anonymous in Mathematics

Two parallel lines are cut by a transversal. One of the two interior angles on the same side of the transversal contains 15[degrees] more than the other. Find the degree measure of the smaller angle....thank you so much!

2007-08-01 11:00:58 · 3 answers · asked by blahhhhhh 2 in Mathematics

If you were to see it with the naked eye. I know it sounds impossible... I see colours, auras, feilds, smoke, waves, people have different lights and waves, plants have auras, dead trees have different ones. All I do is sit on my lanw all day and "work." Everything I see looks like, pixels. For lack of a better word I guess. Like, when your tv doesn't come in so clearly or something, or if you were to stare REALLY closely at your computer screen. Yeah, like that
; )
Anyway, just wondering, evidently humans only use 10% of their brains, so what if I use 11%? It'b be like trying to desbribe smell to someone. Go ahead, try it. It's not impossible, just may seem like it. Ok, I'm done now.

2007-08-01 10:57:59 · 5 answers · asked by flaw 2 in Physics

Some bandages have "no latex" on their boxes to lure buyers to pick that brand. Why is latex bad in bandages? Are cloth bandages better than plastic ones, or is plastic (but latex free) as good as cloth?

2007-08-01 10:57:06 · 9 answers · asked by Jared 4 in Medicine

Solve the equation.

(1) / ( x + 7 ) + (5) / ( x + 6) = (-1) / ( x^2 + 13x + 42 )

2007-08-01 10:53:50 · 4 answers · asked by Anonymous in Mathematics

2007-08-01 10:50:39 · 18 answers · asked by GARY I 3 in Astronomy & Space

2007-08-01 10:50:28 · 1 answers · asked by louisito a. 1 in Chemistry

i waz always wondering how much and if one day i have lots of money i would fly out space to see the moon and the earth?
thanks!!!!!!!!!!!

2007-08-01 10:50:15 · 8 answers · asked by Li 2 in Astronomy & Space

Two parallel lines, AB and CD, are cut at E and F, respectively, by transversal GEFH. If this is it, i have no idea^...can someone help me please!

2007-08-01 10:45:23 · 3 answers · asked by Anonymous in Mathematics

I do know that this is theoretically possible but need to know how to access available technology.

2007-08-01 10:43:59 · 6 answers · asked by Anonymous in Earth Sciences & Geology

If it takes faucet A to fill the tank in 2 hours and faucet B takes 5 hours how long will it take if they work together?

2007-08-01 10:43:02 · 3 answers · asked by Anonymous in Mathematics

Do maggots actually live inside house flies?? I squished a housefly and maggots actually crawled out of the the fly. I always was told that flies laid eggs and then the eggs hatched and became maggots but i actuually saw the maggots crawl out of the dead fly!!!! am i crazy or is this possible?

2007-08-01 10:37:34 · 6 answers · asked by Anonymous in Zoology

For example: If it takes person A 1 hour to paint a house, person B 2 hours to paint the same house, and person C 3 hours to paint the same house, how long would it take if they all painted together?

2007-08-01 10:35:43 · 4 answers · asked by Guitarnoob 2 in Mathematics

If the percent humidity is low but the dewpoint is high, for example 47% humidity for the day but the dewpoint is 64, will it still feel very humid?

2007-08-01 10:35:41 · 6 answers · asked by Anonymous in Weather

2007-08-01 10:35:26 · 7 answers · asked by Tim 2 in Astronomy & Space

2007-08-01 10:32:11 · 18 answers · asked by Dave H 1 in Astronomy & Space