Science & Mathematics - 15 January 2007

complete the word equation for the reaction between calcium carbonate and sulphuric acid.

calcium + sulphuric acid ---> ? + ? + water
carbonate

2007-01-15 06:33:40 · 5 answers · asked by ollie low 2 in Chemistry

Our contractor spread rock salt to de-ice the roads and I was wondering if the rain we continued to get melted the ice? They spread more rock salt within a 24 hour period.

2007-01-15 06:32:09 · 5 answers · asked by STEPHANIE M 1 in Chemistry

A 35 kg mass is allowed to accelerate down a frictionless 15 degree ramp.
a) determine the value of the x-component of the force of gravity.
b) what is the acceleration of the block down the ramp?
d) how long will it take for the block to slide 40m?

2007-01-15 06:29:55 · 3 answers · asked by crazed1511 1 in Physics

2007-01-15 06:29:54 · 9 answers · asked by linifer74 1 in Geography

hey, im 13 atm and im at as grammar school study all the normal subjexts and we're at the time when w need to think about our options and i want mostly to be a GP this is not too ambitious i think but i think i can do it because i have interest in Science Maths communtications etc the subjexts needed but what grades do i actualy need to be a Gp?

Also do you think if i work hard i could become one, as a younger child i was very interested in anatomy so i know a fair bit about the body and how it workds

2007-01-15 06:28:50 · 2 answers · asked by Anonymous in Medicine

2007-01-15 06:28:09 · 3 answers · asked by braves1289 1 in Earth Sciences & Geology

show working out in number form plz

2007-01-15 06:28:08 · 13 answers · asked by Anonymous in Mathematics

My car has a 13.7 gallon tank. Assuming that gasoline is entirely made from octane(C8H18), how many POUNDS of CO2 would be froduced from my car each time I use a tank of gas? How many pounds of CO2 will produce from my car each year(I drive 21,500 miles each year)?
Some equalities you may find useful
- 1 lbs- 4536 kg
1 kg-2.205 lbs.
28.35g-3.785 liters
l inch-2.54 cm
density of octane-.855g/ml
my car averages 29.7 miles/gallon

use the following equation
C8H18 + 12 1/2 O2 --> 8 CO2 + 9H2O
if u can find the answer and show work, it would be greatly appreciated. Im a chem teacher and a student gave this prob. to me. If i get stumped by my student, they may treat me w/ less respect. Please hlp. thx

2007-01-15 06:27:43 · 3 answers · asked by coolphill517 1 in Chemistry

09=9
18=9
27=9
36=9
45=9
54=9
63=9
72=9
81=9
_________
......81=9

2007-01-15 06:26:36 · 5 answers · asked by G-Man 3 in Mathematics

4.8kg of aluminum cools from 35degrees C to 20degrees C .

2007-01-15 06:25:46 · 2 answers · asked by johnfisherdude 1 in Weather

1) The smaller of two triangular numbers whose sum & difference are also triangular numbers.
2) The only cube that is one less than a square.
3) The 2 digit number that is divisible by both the sum and the product of its digits
4) The larger number of the fourth set of twin primes
Please help with all or any of these you may know. Thanks!

2007-01-15 06:25:19 · 2 answers · asked by Anonymous in Mathematics

I'm panicking cause I really need to know by the end of this week or else i'll fail my art class because I've done no research into my topic at all. And iits not even my fault! I've probably looked through every site on the net that thinks it actually knows what the hell the big bang theory is, but they dont! And if they all say different things how am i supposed to know which is right?!
Please, Please, PLEASE HELP!!!!
Thank You!

Norah H.

2007-01-15 06:24:58 · 8 answers · asked by Norah H. 3 in Astronomy & Space

How can I set up an equation for this and then solve it. I need to show my work.

Tim invested $6000 for one year. He invested part of it at 9% and the rest at 11%. At the end of the year he earned $624 in interest. How much did he invest at each rate?

2007-01-15 06:24:30 · 3 answers · asked by Anonymous in Mathematics

My friend and I are working on our science fair project and we need a good name for our lab. We tested to screws to see which kind would be resist rust and corrosion. We used galvanized steel, zinc, copper, and steel. If you have any good titles leave them here.

2007-01-15 06:24:23 · 2 answers · asked by nikkigurl232004 2 in Chemistry

Also, for the time I am interested in it says "G" under the wind char. gusts category. I am guessing that means it was gusting at that time. Also, what is the "Val. for Wind Char." category. It has a number of 17. I assume the value of the wind gust was 17 knots but I'm a lawyer not a weather man. What does all this mean?

2007-01-15 06:24:10 · 2 answers · asked by orzoff 4 in Weather

2007-01-15 06:21:32 · 1 answers · asked by bubblemae2003 1 in Other - Science

salt (or are attached to amino acids - chelates) and increase body pH through a series of chemical reactions they become a part of as they pass from food, from the digestive system into the blood and into cells, causing a release of hydroxide ions or binding up hydrogen ions, both of which increase the concentration of hydroxide ions in the body.

2007-01-15 06:21:25 · 2 answers · asked by Lisa 1 in Chemistry

I need a proof that #(R) <= #(R\Q), where R is the reals and Q is the rationals. I don't think you can create an explict mapping from the Reals to the Irrationals as the function would have to output only irrationals. Therfore it would seem an indirect proof is in order, but if I knew what that proof was I wouldn't have asked the question.

2007-01-15 06:20:31 · 1 answers · asked by Anonymous in Mathematics

which is bigger 50 tenths or 4ones

2007-01-15 06:19:39 · 20 answers · asked by blodwen c 1 in Mathematics

How do they play into the whole natural selection argument?

2007-01-15 06:19:16 · 3 answers · asked by C.J. 2 in Biology

2007-01-15 06:19:07 · 4 answers · asked by dhavala_sss 1 in Astronomy & Space

2007-01-15 06:18:33 · 11 answers · asked by Anonymous in Mathematics

I need a BASIC explanation of evolution and some reasonable evidence against it.

2007-01-15 06:18:24 · 9 answers · asked by C.J. 2 in Biology

Because I'm doing a report on tennesee.

2007-01-15 06:18:03 · 1 answers · asked by Actress/Singer 1 in Geography

2007-01-15 06:17:45 · 4 answers · asked by Rachel 2 in Biology

2007-01-15 06:16:28 · 26 answers · asked by Anonymous in Parapsychology

2007-01-15 06:16:11 · 15 answers · asked by ollie low 2 in Chemistry

my face hurts

2007-01-15 06:15:23 · 4 answers · asked by Anonymous in Zoology

I need to know what attative identity, multiplicative identity, subset of every set, and subset domain is for my math mid-term

Thanks

2007-01-15 06:13:41 · 4 answers · asked by Mark 2 in Mathematics

East of the Mississippi

2007-01-15 06:13:35 · 6 answers · asked by Yahoo 2 in Geography