Science & Mathematics - 17 January 2007

In a solution of NiCl2, the Cl concentration is 0.08684 M. How many grams of NiCl2 are in 338 mL of this solution?

2007-01-17 12:58:13 · 2 answers · asked by Anonymous in Chemistry

I have a little sister and she is always complaining about how she has never seen a shooting star so can anyone tell me when there will be a meteor shower so that I can show her one. Tell me what time, date, and places that we can see the shower. I just really want to show her something that she has never seen before.

2007-01-17 12:57:05 · 3 answers · asked by Andrea luvs u...maybe...lol 3 in Astronomy & Space

2007-01-17 12:56:04 · 4 answers · asked by Anonymous in Chemistry

2007-01-17 12:55:53 · 10 answers · asked by ? 6 in Astronomy & Space

I know that they are the exact opposite, but how do they relate in what their end products are and the amounts(not just H2O, CO2, Glucose, O2, which I already know)

2007-01-17 12:55:30 · 1 answers · asked by al33191 1 in Biology

Ok so here is my question



"The half-life of radium-222 is 38 seconds. How many grams of radium-222 remain in a 12 gram sample after 76 seconds? After 114 seconds? How many half-lives haave occured when 0.75 grams remain?"

2007-01-17 12:55:19 · 9 answers · asked by Anonymous in Mathematics

Also, why aren't revolving stars actually pulled in by a black holes gravity?

2007-01-17 12:51:56 · 3 answers · asked by the walrus 1 in Astronomy & Space

What kind of cells are there? Ex. muscle cells, blood cells...

2007-01-17 12:51:32 · 5 answers · asked by naomi 2 in Biology

Hi i was wondering if anyone could help...
I am doing this lab and I didnt have time to examine the planaria carefully..

1. If you were to stick a bunch of planeria in a beaker and you swirled it around making a current what behavior would they present?

2. You touch the planaria with the end of a probe what happens

3. you stick a cold pack on the outside part of the small beaker containing the planeria?

Please anyone... and please be serious

2007-01-17 12:51:21 · 1 answers · asked by nate 1 in Zoology

2007-01-17 12:50:29 · 6 answers · asked by lk 1 in Mathematics

(sqrt x+4 )= 3

I also need help with this one

(sqrt2y+7) +4 = y

And finally this one has me stumped as well

(sqrt4x+1) +3 = 0


Thank you

2007-01-17 12:49:38 · 3 answers · asked by CookFrNW 3 in Mathematics

(continuation) 2:00p.m. At what time does the rear of the train emerge from the tunnel?

2007-01-17 12:49:32 · 3 answers · asked by Jose C 1 in Mathematics

|a| stands for the order of the element a in G, which means "a" raised to its order gives the identity element, e

2007-01-17 12:49:28 · 5 answers · asked by JasonM 7 in Mathematics

does anyone know how much snow equals one inch of rain?

2007-01-17 12:48:58 · 5 answers · asked by dwayne_barclay 2 in Weather

an airplane flies 400 km west from city A to city B,then 300km northwest to city C and finally 100km north to city D. how far it is from city A to city D? in what direction must the airplane head to return directly to city A from city D?

2007-01-17 12:48:53 · 2 answers · asked by xyre_cool 1 in Physics

2007-01-17 12:47:01 · 4 answers · asked by Christines256 3 in Weather

A cylindrical tube 7.8 cm high and 0.85 cm in diameter is used to collect blood samples. How many cubic decimeters (dm3) of blood can it hold?

--

a. 1.8 x 10–2 dm3
b. None of these is within 5% of the correct answer
c. 4.4 x 10–3 dm3
d. 1.0 x 10–2 dm3
e. 4.4 x 10–4 dm3

--

I got 4.426 units. HELP

2007-01-17 12:45:47 · 8 answers · asked by saira n 1 in Mathematics

y- 3(x-5)^2 +1 and y= 3(x+5)^2 + 1?

a. Their vertices are maximums.
b. The graphs have the same shape with different vertices.
c. The graphs have different shapes with different vertices.
d. One graph has a vertex that is a maximum, while the other graph has a vertex that is a minimum.

What is meant by a vertex that is a "maximum", or a "minimum"? I've simplified both equations down to:
y=3x^2- 30x+ 76 and
y= 3x^2+ 30x+ 76; can I predict how the graph will turn out with just the b terms?

2007-01-17 12:44:38 · 2 answers · asked by sparklycrayons 1 in Mathematics

been looking through my earth science book forever... cant find it. please help. exams tomorrow :/

2007-01-17 12:44:34 · 5 answers · asked by florida queen 2 in Earth Sciences & Geology

2007-01-17 12:44:27 · 3 answers · asked by jmetsdad 1 in Engineering

Formic acid, HCOOH, is responsible for the painful bites of fire ants. Is formic acid a strong or weak acid? Explain.

2007-01-17 12:43:31 · 2 answers · asked by untilyoucamealong04 3 in Chemistry

The water cycle has a beginning and an end.

2007-01-17 12:41:53 · 12 answers · asked by TearDropp 1 in Other - Science

2007-01-17 12:41:32 · 15 answers · asked by ? 6 in Zoology

2007-01-17 12:40:00 · 6 answers · asked by Anonymous in Earth Sciences & Geology

I love my teacher but he is killing me! help

show ur work or explain
doesn't matter who is first but which is better.

Using the given measurements, find the greatest and least possible circumferences and areas for each circle. use (pie)= 3.14. Round answers to the nearest hundredths.
1. 4 cm radius
2. 5.5 cm radius
3. 2.6 radius

2007-01-17 12:39:55 · 17 answers · asked by QueenVicky 2 in Mathematics

2007-01-17 12:39:41 · 18 answers · asked by ? 6 in Geography

3x/4 - 5x/12=5

2007-01-17 12:38:57 · 14 answers · asked by Meggg 1 in Mathematics

A traveling salesman (selling shoes) stops at a farm in the Midwest. Before he could knock on the door, he noticed an old truck on fire. He rushed over and pulled a young lady out of the flaming truck. Farmer Crane came out and gratefully thanked the traveling salesman for saving his daughter’s life. Mr. Crane insisted on giving the man an award for his heroism. So, the salesman said, “If you insist, I do not want much. Get your checkerboard and place one grain of wheat on the first square. Then place two grains of wheat on the next square. Then place four grains on the third square. Continue this until all 64 squares are covered with grains of wheat.” As he had just harvested his wheat, Mr. Crane did not consider this much of an award, but he soon realized he made a miscalculation on the amount of wheat involved (c)Calculate the amount of wheat necessary to fill the whole checkerboard (64 squares). How much wheat would the farmer need to give the salesman? need scientific notation

2007-01-17 12:37:59 · 4 answers · asked by laindia187 1 in Mathematics

omg I suck at proofs!!! *cries* anyhow, I'm not sure how to do this one, and it has to be a two column proof..can anyone help me?

here's the link to the diagram and all:
http://i14.tinypic.com/4br44ld.jpg

please help?

2007-01-17 12:37:13 · 4 answers · asked by Ashboo 2 in Mathematics

white pills marked K39

2007-01-17 12:36:37 · 9 answers · asked by 420 1 in Medicine