Science & Mathematics - 1 January 2007

(a) How many molecules of methane are found in 16.0g of methane gas?

(b) How many atoms of oxygen are found in one mole of oxygen gas?

(c) How many atoms of oxygen are found in one mole of ozone?

(d)How many moles of NaOH are found in 120g of NaOH?

(e) What is the mass, in grams, of 3.01x10^23 formula units of NaOH?

(f) What is the mass, in grams, of 6.023x^25 molecules of ethanol?

Show work plz.

2007-01-01 07:29:01 · 3 answers · asked by Snowboarder91 3 in Chemistry

2007-01-01 07:27:55 · 4 answers · asked by BlackIce Mikel 3 in Mathematics

At the molecular level are infinite complexities exists and within are infinite informations. Information are raw data formed to convey meaningful communication and interpretation.

2007-01-01 07:27:10 · 8 answers · asked by Anonymous in Biology

The number of bacteria in a culture is growing at a rate of 3000e^(2t/5) per unit of time at t=0 the number of bacteria present was 7500. find the number present at t=5

2007-01-01 07:25:16 · 2 answers · asked by Anonymous in Mathematics

I just don't understand this and I have to show work. The question is: A river is flowing at a velocity of 0.15 m/s west. If a swimmer is swimming against the current at a velocity of 0.22 m/s east. how many hours will it take him to swim 1 km? Thanks!

2007-01-01 07:24:38 · 2 answers · asked by abc123 1 in Mathematics

If you compressed hot water where the atoms are highly excited enough to form ice is it possible to prevent the atoms forming bonds with each other so that when the pressure is released the atoms would return to there highly charged state again i.e. hot water.

2007-01-01 07:21:38 · 9 answers · asked by Adam Tuffin 2 in Physics

List all.

2007-01-01 07:20:24 · 3 answers · asked by r_e_a_l_miles 4 in Biology

I'm sure thunder has something to do with heat, but I don't know.

2007-01-01 07:16:25 · 11 answers · asked by Jewel 1 in Weather

im looking for relativity kinda proof. like space and time kinda stuff :)

2007-01-01 07:16:19 · 6 answers · asked by supaherounst 2 in Physics

2007-01-01 07:15:57 · 3 answers · asked by wicked 1 in Mathematics

2007-01-01 07:15:55 · 3 answers · asked by dell10314 1 in Mathematics

Do you have a specific algorythm used to find your answer?

2007-01-01 07:15:09 · 8 answers · asked by popeye squirm 2 in Mathematics

2007-01-01 07:13:42 · 0 answers · asked by armin m 2 in Engineering

I found a spider in my garage. Its body is about a 1/2 inch long, and its legs reach out another inch or two. Whaddya think, folks? Is it a black widow?

http://pg.photos.yahoo.com/ph/rafvelez/album?.dir=/f787re2&.src=ph&.tok=phU2AEGBA4bDaNlu

2007-01-01 07:13:25 · 14 answers · asked by Freaked out 1 in Zoology

Please Dumb down to 9th grade level. thank you!!

2007-01-01 07:12:49 · 3 answers · asked by Anonymous in Earth Sciences & Geology

2007-01-01 07:11:45 · 7 answers · asked by Poopdedo 1 in Engineering

2007-01-01 07:04:44 · 6 answers · asked by ghettodiplomat2005 1 in Biology

and how would it affect performance on rc car

2007-01-01 07:03:40 · 13 answers · asked by JODIE M 1 in Engineering

2007-01-01 07:03:39 · 4 answers · asked by Mandie K. 3 in Zoology

http://www.geocities.com/ramin1102000/book2.html

2007-01-01 07:02:06 · 3 answers · asked by ramin mardfar 1 in Biology

I am thinkging of doing an internship has anyone ever been a part of SCA, what was your experince like? Where did you go? what did you do? etc...
Thank you!

2007-01-01 07:00:17 · 2 answers · asked by Anonymous in Earth Sciences & Geology

good evening. PLease could i have some assistance in the workings of a quadratic equation. THanks

I have the equation:



((square root ((5.37 x 10^-10) x (0.0000135) + [Z])) x [Z]) = 1 x 10^-14

I would like to find the quadratic equation in [Z] ( which represents the concentration of protons in my experiment)

I have tried for an hour and cant do it, so any help greately appreciated. Thanks

2007-01-01 06:57:23 · 6 answers · asked by Anonymous in Mathematics

I have 5.0 grams of a salt dissolved in 25.0 mL of water. I have the temperature of the solution.

Trial One:
highest temperature: 24.0 C
lowest temperature: 11.0 C

Trial Two:
highest temperature: 25.0 C
lowest temperature: 13.0 C

Calculate the heat of solution in J/g for each trial and the average heat of solution. (delta H sub s)

2007-01-01 06:56:43 · 1 answers · asked by KTIZZLE 1 in Chemistry

I thought they were only intended to warn of Tornadoes yet, I hear them all of the time (Including the weekly tests on Tuesday mornings). Isn't the overuse dangerous in case of a real emergency?

2007-01-01 06:56:10 · 2 answers · asked by c_sf 2 in Weather

2007-01-01 06:56:07 · 4 answers · asked by the_guy_with_the_thing 2 in Mathematics

Please show details I don't understand, thank you

2007-01-01 06:55:36 · 4 answers · asked by Anonymous in Mathematics

an airplane travels at 141 km/h toward the northeast. What is its components of velocity?

2007-01-01 06:54:34 · 11 answers · asked by blah 3 in Physics

2007-01-01 06:53:05 · 7 answers · asked by Zefram 2 in Biology

A person that invented something of math and has to be Asian and information about the person's country, their education, what they invented or researched, how has it inpacted the world and a picture.

2007-01-01 06:52:31 · 2 answers · asked by Anonymous in Mathematics

Is Kinetic Energy conserved in an elastic collision? an inelastic collision? neither? or both?

2007-01-01 06:52:29 · 2 answers · asked by blah 3 in Physics