Science & Mathematics - 30 January 2007

what is the forumla for hydrocloric acid? thanks.

2007-01-30 12:59:37 · 1 answers · asked by wazzup 1 in Chemistry

2007-01-30 12:59:26 · 3 answers · asked by grumpycandy_0 1 in Biology

A kangaroo jumps to a vertical height of 2.5 m. How long was it in the air before returning to Earth?

Answer should be in seconds.

2007-01-30 12:57:51 · 3 answers · asked by Jessie L 2 in Physics

I'm trying to cube 0.39 and I sound like an idiot for asking, but could someone help me?

2007-01-30 12:57:26 · 6 answers · asked by i_heart_jake_ryan118 1 in Mathematics

14.9^-5 * 9^-6

15.11^2 * 11^-4

2007-01-30 12:56:30 · 5 answers · asked by Mike 2 in Mathematics

x-2y=2
3x-5y=7

2007-01-30 12:56:23 · 3 answers · asked by Anonymous in Mathematics

I was born with pure red hair as a baby then it turned blonde at around 3 or 4. I completely forgot about having red hair until I was 12 years old. I realized there were some red strands growing back in and I thought I was mutating or something. Now, I'm 14 with more red than back then.... can someone explain?

2007-01-30 12:54:24 · 13 answers · asked by Anonymous in Botany

2007-01-30 12:53:08 · 1 answers · asked by gabrielle c 1 in Zoology

I'm prepping for a midterm; I'll apreciate your help to help me get this concept which escapes me at the moment.

2007-01-30 12:52:03 · 8 answers · asked by RogerDodger 1 in Mathematics

solve for x:

^ 2 = squared

log( x ^ 2 - 16 ) - 1 = log ( x + 4 )

2007-01-30 12:51:18 · 1 answers · asked by element69ca 1 in Mathematics

Few years back then then PM of India, late Hon'ble Moraji Desai jee was advocating drinking one's own urine against ailments. Will it cure and scientifically? it is correct to drink urine? Further if one's own urine is put on eyes will it cure his/her catract and other related ailments. Similary can urine be applied on wounds or used as a after shave liquid? Will drinking one's own urine be a rejunavative medicine? If all this are correct why scientists should not collect urine of others too, purify them scientifically and sold the same as a cheap medicine?

2007-01-30 12:49:15 · 5 answers · asked by Anonymous in Medicine

2007-01-30 12:48:51 · 3 answers · asked by im ur daddy 2 in Engineering

2007-01-30 12:47:30 · 3 answers · asked by alexandra5489 1 in Mathematics

Al is 9 years younger than Jim, Bob is 3 years younger than Al, and Pat is 17 years older than Bob. How old is each if the sm of their ages is 76?????

2007-01-30 12:47:06 · 5 answers · asked by Jamie P 2 in Mathematics

2007-01-30 12:46:28 · 12 answers · asked by grumpycandy_0 1 in Biology

Aluminum sulfate is poured into sodium hydroxide solution.
The balanced chemical equation is
Al2(SO4)3+6NaOH → 2Al(OH)3 +3Na2SO4.

If 35.0 mL of 0.400 M (moles) sodium hydroxide is used, how many moles of aluminum hydroxide can be produced? Explain how the aluminum hydroxide could be isolated after the reaction.
If only 0.00442 moles of aluminum hydroxide were isolated, what would the percent yield be?

2007-01-30 12:44:07 · 3 answers · asked by San Fran Kid 2 in Chemistry

a ride at the amusement park has a sign saying: "five minutes of thrills and spills!"

yoshi noted the start time of 11:55:26 and the finish time of 12:00:12. was the sign accurate? explain.

2007-01-30 12:43:36 · 7 answers · asked by havingfun 4 in Mathematics

2007-01-30 12:43:25 · 6 answers · asked by (♥) *YoEn* (♥) 1 in Astronomy & Space

2007-01-30 12:42:37 · 4 answers · asked by J 6 in Physics

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Given the following data:


C2H2 + 2.5O2 → 2CO2 + H2O DH = −1300 kJ


C + O2 → CO2 DH = −394 kJ


H2 + 0.5O2 → H2O DH = −286 kJ




Calculate DH for the reaction


2C + H2 → C2H2



Please answer and explain thank you!

2007-01-30 12:42:11 · 1 answers · asked by geebgeebgeeb 1 in Chemistry

I read this in a few places on the net. Is it true? Or is it just a bunch of BS?

2007-01-30 12:41:37 · 8 answers · asked by Roman Soldier 5 in Medicine

I have been researching and I know that the difference is 50 but would the correct answer be 50 or 10\5 (10 to 5th power) :)
what is the difference?

2007-01-30 12:40:49 · 5 answers · asked by bellaandbobby 2 in Physics

2007-01-30 12:37:54 · 2 answers · asked by RogerDodger 1 in Mathematics

2007-01-30 12:37:33 · 3 answers · asked by angie 1 in Physics

2007-01-30 12:36:46 · 5 answers · asked by alexandra5489 1 in Mathematics

Hi, as said in the subject, this is a serious question. If anyone knows any website, or books I can read with information like this? I would really like to know, and see if this is possible, and maybe practice it a little.

2007-01-30 12:36:29 · 16 answers · asked by Anonymous in Paranormal Phenomena

i need the prime factorization for 27, then for 92

2007-01-30 12:35:38 · 4 answers · asked by blubb 1 in Mathematics

I have an algebra story problem that I've worked like 10 times and I have no idea how to get the answer!! Can anyone show me how to work it out??---- Connie is 2/3 as old as her cousin. The sum of their ages is 45. How old are Connie and her cousin?---- I could really use some help!!

2007-01-30 12:35:29 · 5 answers · asked by shelleybee 2 in Mathematics

I do not understand these questions at all. Would you please explain the answers? I very much apperiate it!

1. How much sugar is there in 100 mL of a 10 percent aqueous sugar solution? What is the solvent in this solution?
2. What are the relative numbers of H3o+ and OH- ions in a acidic, an alkaline, and a neutral solution?
3. How many times more hydroxide ions are there in a solution with a pH of 9 than in a solution with a pH of 3?
4. If a solution has a pH of 7.5, what would its new pH be if the concentration of H3O+ ions in the solution were increased by 100 times?

(Sometimes this is like a forgein language...If you get it-gezz you are my hero!)

2007-01-30 12:34:47 · 3 answers · asked by questionthewitness 1 in Biology

2007-01-30 12:34:06 · 1 answers · asked by ibid 3 in Biology