Science & Mathematics - 27 December 2006

C2H4(g) as it changes over time at a fixed temperature until equilibrium is reached.
2) Caulculate equilibruim concentrations
c)Calculate the percent reaction at equalilibrium

2006-12-27 05:54:22 · 3 answers · asked by Nikki S 1 in Chemistry

Terry is ten years older than this brother Tomas. Twenty years ago, Terry was twice as old as Tomas. How old is Terry now?

This is what I guessed up:

x-20=2(x+10)

The answer comes out to -40 which I know is not right.

2006-12-27 05:54:01 · 7 answers · asked by Anonymous in Mathematics

2006-12-27 05:53:31 · 10 answers · asked by Angel-Iris V 1 in Mathematics

I got a telescope for xmas and i dont know where to find great aswome planets and stars.

2006-12-27 05:50:40 · 4 answers · asked by denvergrandslam 1 in Astronomy & Space

2006-12-27 05:49:36 · 10 answers · asked by Laguna Tim 2 in Chemistry

2006-12-27 05:47:36 · 8 answers · asked by nami 4 in Chemistry

I know what mitosis is and I understand it's important, but I can't really explain why it is. Any help?

2006-12-27 05:46:02 · 5 answers · asked by Beata 2 in Biology

And we judge their distance by their light, then that would mean we are looking at what billions of years ago looked like. How could anyone figure out the vastness of the universe if the information we depend on is billions of years out of date?

2006-12-27 05:45:48 · 15 answers · asked by Jerse 1 in Astronomy & Space

I've heard that other animals can see more colors than we humans can. If so, what are the colors like?

2006-12-27 05:44:05 · 6 answers · asked by Robby_G 2 in Physics

I had two glass bottles of Coca Cola® with my lunch today, one was made of glass with a green tint and the other of clear, both bottles had the same batch number but from the markings on them i deduced that the clear one was made from recycled glass. The embossing on it was also not as legible as on the green bottle. What is it that is added to new glass to give it this green tint, what is the purpose of it and why is it lost when the glass is melted and re-moulded?

2006-12-27 05:40:13 · 3 answers · asked by sporritt 2 in Chemistry

2006-12-27 05:38:27 · 3 answers · asked by bcauble1 2 in Zoology

Balance the following equation:
C2H6 + 02 -> CO2+H20

2006-12-27 05:37:46 · 8 answers · asked by queenpravato 1 in Chemistry

2006-12-27 05:35:15 · 4 answers · asked by PM 1 in Mathematics

Can someone explain interval notation in easy to understand language? Thanks

2006-12-27 05:28:57 · 4 answers · asked by bobbysgirlmeri 2 in Mathematics

a) Write an expression for the slope of the curve at any point (x,y)
b) find the equation of the tangent lines to the curve at the point x=2
c) find the second derivative at (0,4)

thanks!!!

2006-12-27 05:27:41 · 4 answers · asked by dell10314 1 in Mathematics

Do you think it has something to do with religion or science? Why will it happen? From a meteor or an ice age? Or will we bring this upon ourselves? How far in the future will we actually make it and how do you know all this?

2006-12-27 05:26:38 · 8 answers · asked by chelsyrox1010 1 in Earth Sciences & Geology

help would be appreciated

2006-12-27 05:25:51 · 3 answers · asked by dell10314 1 in Mathematics

What needs to be taken into account when testing aerodynamics in awind tunnel, fore example Geometric and Dynamic Similarities, can anyone give a fairly detailed answer or a good webiste to reseach from. Thanks

2006-12-27 05:25:32 · 4 answers · asked by Arkle 2 in Engineering

limestones. Calcium carbonate forms when dissolved carbon dioxide and calcium ions combine, according to the followingequilibrium:

CaCO3(s) +2H9(aq) = Ca2+(aq) +H2O(l) + CO2(g)

Use the Le Chateliers principle to answer the follwing:
a) How would the stalagmites and stalacties be affected if the water in the cave became more acidic?

b) How would the hardness of the water [Ca2+(aq)] affect the growth of stalagmites and stalacties?

2006-12-27 05:25:25 · 3 answers · asked by Nikki S 1 in Chemistry

help please!

2006-12-27 05:24:49 · 4 answers · asked by dell10314 1 in Mathematics

if the function f (x) is continuous and differentiable=
ax^3-6x; if x< or = to 1
bx^2+4; x>1

what does a equal?

2006-12-27 05:23:50 · 3 answers · asked by dell10314 1 in Mathematics

please help!

2006-12-27 05:21:00 · 4 answers · asked by dell10314 1 in Mathematics

2006-12-27 05:19:15 · 13 answers · asked by david 1 in Biology

.......these fingers are similar in function but different in structure from human fingers.human fingers and elephant fingers are which of the following?
anolgous structures,mimic structures,homolgous structures,or vestigial structures?

2006-12-27 05:16:58 · 2 answers · asked by Anonymous in Biology

Example: Substance/device A attracts substance/device B. However, A remains stationary and unaffected while B is attracted by A and therefore moves towards A. In the meantime A is not anchored or immobilised in any manner.

2006-12-27 05:14:01 · 9 answers · asked by Anonymous in Physics

i want to understand how all these graphical reprasentations are used in our daily life.i want to know for what purpose people use it

2006-12-27 05:11:28 · 6 answers · asked by Jagjit Singh 1 in Engineering

2006-12-27 05:08:30 · 3 answers · asked by tika 1 in Mathematics

2006-12-27 05:05:47 · 11 answers · asked by ballrmotsq 1 in Botany

2006-12-27 05:05:47 · 14 answers · asked by duguu89 1 in Biology

Beyond the urban myths, please

2006-12-27 05:04:56 · 3 answers · asked by Jim G 5 in Zoology