Science & Mathematics - 29 September 2007

( this is from the chem lab finding the formula of a hydrate)

2007-09-29 06:50:59 · 3 answers · asked by pink 1 in Chemistry

I'm having trouble understanding the difference between what enthalpy and heat are and how they're related.

2007-09-29 06:46:37 · 2 answers · asked by bob oso 2 in Chemistry

its for my 6th grade science camp how do i earn money besides chores it is up in big bear

2007-09-29 06:46:20 · 6 answers · asked by Anonymous in Earth Sciences & Geology

2007-09-29 06:40:59 · 7 answers · asked by Maxy_Paxy 3 in Other - Science

How do you figure out what 2.5% of 6000 is?

2007-09-29 06:40:24 · 10 answers · asked by Anonymous in Mathematics

Calculate the mass of 3.37×1021 molecules of copper(I) carbonate.
Calculate the number of lithium ions in 3.53 g lithium sulfate.

2007-09-29 06:40:14 · 2 answers · asked by Anonymous in Chemistry

The first equation is y=3x+5; I plug the equation into (Y=) but then an error appears. The second equation is g(x)= - [g(x)]

2007-09-29 06:37:35 · 4 answers · asked by Anonymous in Mathematics

so they give me a picture. it is a rectangle with 2 half circles. one on each side. well they dont give me the radius

how do i find the radius? the width is 329 m and the length is 300 m

2007-09-29 06:37:33 · 7 answers · asked by Catholic 14 5 in Mathematics

Enter the formula for each of the following binary ionic compounds.
magnesium phosphide

aluminum selenide

cobalt(III) telluride

iron(III) sulfide

2007-09-29 06:36:45 · 2 answers · asked by Anonymous in Chemistry

heres the question..

Specimens in the compound scope are:

a. reversed
b. inverted.
c. reverse and inverted
d. unchanged

i think the answer is C but im not sure .. can some one help me?

2007-09-29 06:32:51 · 2 answers · asked by athrun360 2 in Chemistry

A compound contains only carbon C, hydrogen H, and oxygen O. When 6.737 grams of this compound is burned completely in air, 16.156 grams of CO2 and 3.307 grams of H2O are produced. What is the empirical formula of this compound?

If the molar mass of the compound described in the previous question is 275.3, what is its molecular formula?

2007-09-29 06:29:03 · 2 answers · asked by Anonymous in Chemistry

2007-09-29 06:23:35 · 4 answers · asked by Anonymous in Physics

A student measures 1.7296 g of a mixture of sand and sodium carbonate, which is later determined to be 24.29% sand.

What mass of Na2CO3 was in the original mixture?
How many moles of Na2CO3 were in the original mixture?

2007-09-29 06:23:25 · 3 answers · asked by Anonymous in Chemistry

Or just stay in bed.

2007-09-29 06:22:30 · 19 answers · asked by Anonymous in Astronomy & Space

at each instant, can you compute the vehicle's position after a certain time from these data? If so, explain how this might be done.

2007-09-29 06:21:06 · 2 answers · asked by Anonymous in Physics

2007-09-29 06:20:56 · 4 answers · asked by Red Rage 1 in Astronomy & Space

2007-09-29 06:20:37 · 19 answers · asked by Father Ted 5 in Paranormal Phenomena

I have and experiment that i gotta do so how do i prevent a water ballon from popping when i drop it down several feet. any ideas for cushions or a parachute maybe?

2007-09-29 06:16:54 · 4 answers · asked by Anonymous in Physics

1. 2y + 8 < -3x -7; ( -3, 0)
2. y less than or equal to 3x + 2; ( 3,10)
3. 1/2y - 2/3x greater than or equal to 3/4; (1, 1.5)

2007-09-29 06:15:17 · 2 answers · asked by Anonymous in Mathematics

height. Is the magnitude of the acceleration greater while it is being thrown or after it leave your hand? Explain.

2007-09-29 06:12:35 · 2 answers · asked by Anonymous in Physics

2007-09-29 06:10:59 · 16 answers · asked by Anonymous in Biology

What factors must be present in order for hurricane to form?

2007-09-29 06:10:11 · 5 answers · asked by Jason M 2 in Weather

2007-09-29 06:09:40 · 12 answers · asked by John M 2 in Astronomy & Space

Person throws .15 kg baseball at speed of 42 m/s. Initial angle is 20 degrees. What is KE of ball at highest point?

2007-09-29 06:08:09 · 1 answers · asked by ひいらぎ 5 in Physics

atm -how it works

2007-09-29 06:07:46 · 3 answers · asked by Anonymous in Chemistry

2007-09-29 06:06:58 · 5 answers · asked by saidg22 1 in Zoology

...

2007-09-29 06:02:35 · 2 answers · asked by popstardummy 1 in Other - Science

2007-09-29 06:00:28 · 2 answers · asked by sciencenerd 2 in Chemistry

2007-09-29 05:58:28 · 1 answers · asked by claudia c 2 in Other - Science

I want to interfere AM/FM radio waves in my house. My sister is listening to friggin disney channel radio and I want to get rid of this stupid music. Where I could find a transmitter that could do that?

2007-09-29 05:58:06 · 4 answers · asked by Bob 2 in Engineering