Science & Mathematics - 14 January 2007

2007-01-14 13:50:51 · 9 answers · asked by helmut_57 1 in Chemistry

2007-01-14 13:46:48 · 6 answers · asked by Anonymous in Mathematics

chemistry problem. simple. Is this correct?
make 50ml of solution
from:
25mM of tris
50mM of glucose
10mM of EDTA
____________
should I calculate each one seperately..
.025mol/L * .05L * 121 (MW of tris) = .15 g?
And do the other 2 the same way?
I get the answer in g? and then would i combine it all in one beaker then add water?

2007-01-14 13:45:44 · 3 answers · asked by Vee 5 in Other - Science

chemistry problem. simple. Is this correct?
make 50ml of solution
from:
25mM of tris
50mM of glucose
10mM of EDTA
____________
should I calculate each one seperately..
.025mol/L * .05L * 121 (MW of tris) = .15 g?
And do the other 2 the same way?
I get the answer in g? and then would i combine it all in one beaker then add water?

2007-01-14 13:45:03 · 1 answers · asked by Vee 5 in Chemistry

but the water never gets hot....and there are lights in it that change color....how is the vapor like mist created ?

2007-01-14 13:43:49 · 5 answers · asked by Anonymous in Other - Science

2007-01-14 13:43:21 · 5 answers · asked by vignesh9211 1 in Mathematics

how can i find the measure of each angle of a quadrilateral MATH?

angle M= 3x-3
angle A= 5x+13
angle T= 8x-8
angle H= 8x+2


what are it's measures?

what's the solution?

2007-01-14 13:43:12 · 2 answers · asked by tapakani 1 in Mathematics

2007-01-14 13:38:58 · 3 answers · asked by Taz 2 in Mathematics

2007-01-14 13:37:49 · 10 answers · asked by terry l 1 in Astronomy & Space

ok, i have this question... i have to answer, but its like italian to me!! plz here it goes...

sodium salicylate is made from carbon dioxide and sodium phenoxide. identify each of these substances as a reactant or a product...


how do i tell them apart? which one is whitch? plz, this is the first homework i got in this class, and o already feel like i'll fail! :(

2007-01-14 13:37:47 · 8 answers · asked by Anonymous in Chemistry

2007-01-14 13:37:24 · 10 answers · asked by Anonymous in Mathematics

I need a rough figure of how long it would take for that dosage to become weaker, thus requiring more dosage. I'm asking this from a preventative viewpoint, as I do not want to become dependent/addicted on it, because I have to take it for 1-2 weeks.

2007-01-14 13:36:17 · 5 answers · asked by arsenies@sbcglobal.net 3 in Medicine

2007-01-14 13:36:10 · 2 answers · asked by Anonymous in Geography

Given that, before too long all of the cells in our body would be replaced by new ones, why wouldn't it be possible to use gene therapy to improve the condition of someone with Down's Syndrome?

2007-01-14 13:35:24 · 5 answers · asked by DBrain 1 in Medicine

I believe physic powers are real,so is it even possible for a person to see another's past life and predict their future?Does astroligy have anything to do with it?

2007-01-14 13:34:35 · 14 answers · asked by Anonymous in Astronomy & Space

a) parallelogram
b) trapezoid
c) rectangle
d) equilateral quadrilateral
e) convex polygon

2007-01-14 13:33:05 · 9 answers · asked by gally 1 in Mathematics

because i was watching the news and it said that memory chips
get smarter by 3times each year since the late 1800's and by the future the chips will be smarter than humans .... is this true?

2007-01-14 13:31:25 · 12 answers · asked by Anonymous in Astronomy & Space

I am thinking about changing my major to chemical engineering, cause I love chemistry. What kinds of jobs could I get with a major in chemical engineering?

2007-01-14 13:28:16 · 3 answers · asked by ♥star.light 2 in Engineering

Some weather sites, like Yahoo! Weather for examle, give a "feels like" temp that's often much higher or lower than the actual temp. I'm wondering what it takes for water to freeze. If Yahoo reports that it's 35 degrees out, but that it feels like 26, will water freeze? Does the temp have to be below 32? Or just feel like it's below 32?

2007-01-14 13:28:14 · 6 answers · asked by maluba 3 in Weather

a 24volt d.c motor rated at 1/16 of a h.p and 7000 r.p.m.coupled to a 200 to 1 reduction gearbox.what would be the output power.and the r.p.m.

2007-01-14 13:25:06 · 4 answers · asked by tugboat 4 in Engineering

4. One can of orange juice concentrate is mixed with three cans of water.

a) How much orange juice can you make with one 250-ml can of concentrate?

b) How many 250-ml cans of concentrate are needed to make 5L of juice

please show your calculations

2007-01-14 13:22:37 · 2 answers · asked by 24 inch chain!!! 2 in Mathematics

kindly send me if lab protocol is available

2007-01-14 13:21:50 · 3 answers · asked by bioanalyst 1 in Chemistry

Solve the following equation:

cos 2x + sin 2x = 1

2007-01-14 13:20:24 · 4 answers · asked by Paradox 2 in Mathematics

2007-01-14 13:19:53 · 2 answers · asked by Anonymous in Engineering

4 years ago i started having lots and lots of dejavu which i remembered some of thee events happed in my dreams.(i don't have them as much as i used to). Not only that but back in freshman year of high school, we used to play a game where we had to guess under different cards of math problems which some had bonus pts and i would try to clear my mind until one stuck out, it was like i was looking for a yellow glow and would always guess the one that glowed and got all the bonuses. Is this a psychic ability, if so how do i develop it before its lost? (i say lost because, i don't experience it as much as i used to 4yrs ago) - is there any other abilities i can develop because i been trying telekinesis and it hasn't came through yet from what i learned off the internet?

2007-01-14 13:17:58 · 18 answers · asked by kyle b 1 in Paranormal Phenomena

what are 3 examples of a phisical change? and 3 examples of a chamical change?

2007-01-14 13:16:57 · 4 answers · asked by Anonymous in Chemistry

And how did you get the answer, Im having a tought time converting mmols to grams.

2007-01-14 13:16:10 · 1 answers · asked by dfgh d 1 in Chemistry

2007-01-14 13:13:06 · 5 answers · asked by Anonymous in Mathematics

2007-01-14 13:11:22 · 7 answers · asked by Anonymous in Mathematics

how much did it wheigh and where was it found

2007-01-14 13:11:12 · 1 answers · asked by Romeo C 3 in Astronomy & Space