Science & Mathematics - 4 October 2007

Diethyl ether is a common laboratory solvent. It has limited solubility in water, thus it is commonly used for liquid-liquid extraction. Being less dense than water, the ether layer is usually on top Im Not sure but its is counterpart Dichloromethane (DCM) or methylene chloride is the chemical compound with the formula CH2Cl2. It is widely used as a solvent??????

2007-10-04 13:37:59 · 6 answers · asked by Anonymous in Chemistry

tiles wide, Find the number of tiles that touch the walls of the room?

2007-10-04 13:37:48 · 11 answers · asked by Anonymous in Mathematics

I took it last year but I totally forgot this word its at the tip of my tounge!!!

mountains, rivers, deserts are forms of natural _______

I need your help!

2007-10-04 13:33:25 · 3 answers · asked by oh my 1 in Geography

The visible region of the electromagnetric spectrum lies between the wavelengths:

____________ and ____________ meters
or ______________ and __________ cm
or ______________ and ____________ nanometers
or _______________and ______________ Angstoms

if you know any of this please help!

2007-10-04 13:32:48 · 1 answers · asked by Maddi J 2 in Chemistry

2007-10-04 13:30:44 · 6 answers · asked by Anonymous in Astronomy & Space

convert y=2/3x+1/4 into standard form. dont quite get how to do this. thanks

2007-10-04 13:30:32 · 1 answers · asked by coolness66 1 in Mathematics

can you answer this question Can a vector have a component greater than its magnitude?

2007-10-04 13:29:57 · 3 answers · asked by jack s 2 in Physics

1-16x^4

2007-10-04 13:29:56 · 5 answers · asked by Anonymous in Mathematics

2007-10-04 13:26:57 · 9 answers · asked by adamsaleatha 1 in Mathematics

A rectangle has sides of 3x – 4 and 7x.
What is the expression that represents its perimeter?

2007-10-04 13:26:37 · 5 answers · asked by Anonymous in Mathematics

ok this is my last math question for the day :D


here we go..


do the data in the table represent a linear finction? If so write the rule for the function.

x -2 -1 0 1 2
y 0 3 6 9 12




THANK YOU EVERYONE :D

2007-10-04 13:23:15 · 4 answers · asked by Anonymous in Mathematics

how can we use "pseudoephedrine"
like ingestion of it

whats the interesting facts, statistics of it
like % of users, teen users, overdosed

pseudoephedrine is use it in some drug or medicine
or it just use it by itself?

2007-10-04 13:22:36 · 4 answers · asked by Ｃrｅ* 2 in Medicine

2007-10-04 13:22:25 · 1 answers · asked by abi 1 in Chemistry

its not de ja vu, its more eenhanced and tricky, i think maybe i can time travel? its so so hard to explan but i can move forward in time..

2007-10-04 13:22:17 · 10 answers · asked by Anonymous in Paranormal Phenomena

2007-10-04 13:22:08 · 2 answers · asked by Anonymous in Mathematics

how do i calculate the empirical formula of the compound formed? thank you ^_^

2007-10-04 13:21:28 · 1 answers · asked by dalastmyth 2 in Chemistry

need to solve the equation, solve for x

x / x^2-1 - x+3 / x^2-x = -3 / x^2+x

havin trouble workin it out

2007-10-04 13:20:51 · 5 answers · asked by dreamerchacho 2 in Mathematics

Decide whether the give number is a solution of the equation


|3x+8| = 20; -4



|6+3x|=0;-2



How do i know? please explain

Thank you :)

2007-10-04 13:20:13 · 6 answers · asked by Jessie 1 in Mathematics

i just need a reminder on how to solve this problem.

find the slope intercept form of the equation of the lin that passed through the given point and has the indicated slope.

(2.3,-8.5) m= -5/2

2007-10-04 13:19:21 · 2 answers · asked by Stephanie 3 in Mathematics

Find the derivative of the function.
y = e^(5x cos x)
y' =

2007-10-04 13:18:54 · 2 answers · asked by Anonymous in Mathematics

Find the derivative of the function.
g(t) = 1 / (t^3 + 3)^4
g'(t) =

Find the derivative of the function.
y = r / sqrt(r^2 + 8)
y' =

Find the derivative of the function. (Remember to enter trigonometric powers such as sin^2x as (sin x)^2.)
f(t) = root3(1+tan t)
f '(t) =

Find the derivative of the function.
y = 7^(1 - x^2)
y' =

2007-10-04 13:17:49 · 2 answers · asked by Anonymous in Mathematics

i just saw a question on here about it, is it posible to smoke spit? and what effects??

2007-10-04 13:17:34 · 4 answers · asked by Anonymous in Other - Alternative

i need to know

2007-10-04 13:15:41 · 1 answers · asked by the w 2 in Mathematics

33. Before the CRT exam is administrated your mathematics quater is 90. What grade do you need on the CRT exam to have a 92 average for the quarter?

34. The selling price for a stereo is 10.28 more than 2 times the wholes sale cost. What is the cost of the stereo?

2007-10-04 13:15:23 · 1 answers · asked by Andre R. 1 in Mathematics

2007-10-04 13:15:00 · 2 answers · asked by kakalaky1 1 in Mathematics

2007-10-04 13:14:02 · 1 answers · asked by Anonymous in Mathematics

please help

2007-10-04 13:11:59 · 3 answers · asked by garrett m 1 in Mathematics

or a spooky encounter of any kind, please explain.

2007-10-04 13:11:45 · 5 answers · asked by Anonymous in Paranormal Phenomena

2007-10-04 13:11:22 · 2 answers · asked by pab_flores 1 in Mathematics

does electrical engineering require alot of physics?

2007-10-04 13:10:00 · 19 answers · asked by kbmqv 2 in Engineering