Science & Mathematics - 22 July 2007

2007-07-22 10:43:59 · 1 answers · asked by AP 1 in Earth Sciences & Geology

Given the following data:

SrO (s) + CO2 (g) --> SrCO3 (s) delta H= -234 kJ

2 Sr (s) + O2 (g) --> 2 SrO (s) delta H= -1184kJ

C (graphite) + O2 (g) --> CO2 (g) delta H= = -394

Calculate the standard molar enthalpy of formation for SrCO3 (s).

2007-07-22 10:43:32 · 2 answers · asked by hennessee_h 1 in Chemistry

-1/3 divide by -2/5


dividing fractions

2007-07-22 10:40:42 · 9 answers · asked by Pretty 1 in Mathematics

2007-07-22 10:34:53 · 4 answers · asked by N.y.Rych 1 in Chemistry

is it general electric or general motors...

2007-07-22 10:30:22 · 3 answers · asked by ixat02 2 in Other - Science

2007-07-22 10:24:02 · 9 answers · asked by Jack M 1 in Mathematics

2007-07-22 10:21:20 · 2 answers · asked by Butch Cassidy 2 in Medicine

2007-07-22 10:18:02 · 4 answers · asked by Anonymous in Physics

every time i get a day off of work it rains like crazy! i noticed this happening since 1999. Do you think i would be able to go to a state or a country in need of rain and make it rain over there? would i be able to SELL my services to other countries for the rain i can bring for their crops? there is a catch though...i need to work 5 days a week and then when i have a day off it will rain like crazy! i cant even remember the last time it was nice and sunny on my day off....but when i am at work the weather is nice...its weird.....could i sell my services on Ebay you thinik? please help me! i want to make money off of my "powers." Thanks!

2007-07-22 10:10:27 · 11 answers · asked by Anonymous in Weather

find a polynomial equation with integer coefficients for the set of coplanar points described.

Problem: each point is equidistant from the point (2,5) and the line x= -3.

2007-07-22 10:08:41 · 3 answers · asked by treehugger 1 in Mathematics

recently i read a book called inside the brain by Ronald kotuluk and i liked it alot! now i want to learn more about brain so can you suggest me some good books!
thanks for your help

2007-07-22 10:04:55 · 3 answers · asked by Anonymous in Medicine

It was found in our bucket of old bird seed. It has the small body of a flea but has 6 tiny thin legs and a long mouth. It looks as though it's a cross between an ant and a fly but has no wings.

2007-07-22 10:01:52 · 10 answers · asked by deborah_jean_1977 1 in Zoology

1. simplify. 5 qt 9 pt

2. A baseball team wins 11 of its 25 games with no ties. Write the ratio of wins to losses.

3. Determine whether the pair of fractions is proportional: 4/11=12/33



Please, I'm unsure of them...

2007-07-22 10:01:24 · 5 answers · asked by Brekn'dwn 1 in Mathematics

2007-07-22 09:57:39 · 6 answers · asked by Jack M 1 in Mathematics

2007-07-22 09:53:02 · 16 answers · asked by ohwiseone 3 in Botany

2007-07-22 09:50:23 · 17 answers · asked by Anonymous in Biology

http://i181.photobucket.com/albums/x85/ctti_3/untitled-33.jpg

2007-07-22 09:48:32 · 2 answers · asked by chimstr 1 in Mathematics

huh would ya ?

2007-07-22 09:48:23 · 18 answers · asked by Anonymous in Botany

solve the system by substitution

2007-07-22 09:46:53 · 11 answers · asked by LASHANDA F 1 in Mathematics

Ok can someone help becaue i am not getting this. I think my problems use distributive property and the subtraction, addition, division or multiplication property as well..
i dont know how to solve them so lease help me

one of my problems is 3x+2(x-1)=8

another is 6(2-r)=-18

2007-07-22 09:36:42 · 7 answers · asked by Anonymous in Mathematics

also, why doesnt the food get warm on the inside?

2007-07-22 09:35:04 · 10 answers · asked by yeeaahhbuddy 2 in Physics

haha

2007-07-22 09:32:34 · 5 answers · asked by Anonymous in Physics

Please solve all three if possible but if not try to solve one or two
how do u solve the followings:
1) the square root of "a" squared + 2a - 10 = a
2) square root of "b" squared - 7b + 6 = b - 4
3)square root of 3y squared + 5y + 6 = y +3

2007-07-22 09:31:17 · 8 answers · asked by What 5 in Mathematics

Factor the trinomial by grouping.
12x^2 + 25x + 12

(12x + 4)(x + 3)
(3x + 4)(4x + 3)
(3x - 4)(4x - 3)
prime

2007-07-22 09:31:02 · 2 answers · asked by Anonymous in Mathematics

2007-07-22 09:30:31 · 5 answers · asked by willie joe m 1 in Biology

Thank you in advance! I am completely lost when it comes to equations!

2007-07-22 09:29:47 · 9 answers · asked by earthgirl 2 in Mathematics

Can you please show me step by step on how to get this answer?

The tank contains 55.2 g butane
Butane is used to fill gas tanks for heating. The following equation describes its combustion

2CH410(g) + 13O2(g) -- 8CO2(g) + 10H2O(g)

2007-07-22 09:28:09 · 1 answers · asked by Holly D 3 in Chemistry

I'd like to hear some reasoning that works against the theory that 12/12/12 is the end of the world. Or in other words, why won't the world end in 2012?

2007-07-22 09:27:07 · 10 answers · asked by heckyealevel1foreverlol 2 in Earth Sciences & Geology

This is very impressive equation however it should be improved therefore I plan on to enhance the equation. Can you help me?

2007-07-22 09:26:05 · 1 answers · asked by THINKER 1 in Mathematics

Look. Alright I was sitting in Science class one day and I got reallly into alien life. Out of the 92 natural elements. Only 1 planet that we know of has Oxygen in its Atmosphere( Earth the only place with oxygen ). Oxygen is needed for life. Out of the 32 billion planets in the Universe. 1 could hold Oxygen Giving it the ability to hold life to organsims as to germs and bacteria. Why would they doubt?

2007-07-22 09:25:19 · 24 answers · asked by fruitsnacks200 1 in Astronomy & Space