Chemistry - February 2007

2007-02-04 11:55:42 · 2 answers · asked by John S 1

im a freshman i have been challenged to build a model of a atom i chose hydrogen how many electrons does an hydrogen atom have i fiqured one but i wasent quite sure i wanted to make sure and how many protons and nuetrons are in a hydrogen atom i left my book at home and i cant recall how to tell by using the atomic number i think it was thanks

2007-02-04 11:51:14 · 3 answers · asked by livindead91 2

2007-02-04 11:44:11 · 1 answers · asked by symia87 1

2007-02-04 10:12:00 · 7 answers · asked by kyle34_0 2

2007-02-04 09:42:05 · 6 answers · asked by suuyeawn. 2

2007-02-04 09:30:50 · 4 answers · asked by ellen105 2

Would there be 1 or 3? Thanks!

2007-02-04 09:27:46 · 4 answers · asked by silver 2

(STP) Standard temperature and pressure

2007-02-04 09:23:14 · 3 answers · asked by green_rox 2

I cannot find anything appropriate for thier age level on the internet
any help would be appreciated!!

2007-02-04 09:08:45 · 2 answers · asked by KBZ 1

a bactericidal substace

2007-02-04 08:47:32 · 3 answers · asked by DavenXport 1

what is the solubility of AgCl in water if Ksp is 1.6x10^-10?

how do u solve for this?

2007-02-04 08:42:44 · 1 answers · asked by Anonymous

I've heard that it's dangerous.....but how? And is it really possible to get high off of it? I'm not thinking of trying, but at the school dance last night tons of kids were breathing in balloon after balloon in the hallway to see how high they could make they're voice.

2007-02-04 07:46:11 · 9 answers · asked by Sarah 4

Does Magnesium react faster in Hydrochloric acid or does calcium. Also, does magnesium react in water?

2007-02-04 07:20:42 · 1 answers · asked by fashionistaqt 3

2007-02-04 07:17:48 · 5 answers · asked by R I 1

an intravenous solution was prepared for a patient. .25 kg of drug a was dissolved in saline solution and brought to a volume of 1 liter. What is teh concentration of the solution in milligrams of drug a per ml of solution. show your work using conversion factors

2007-02-04 06:54:42 · 1 answers · asked by shamrock 1

100.0 mmoles of HI are initially in a 1.00 L container at 800 K After 900.0 seconds the concentration reduces to 0.0100 M.


What is the average rate of production of H2 in mmole / min ?

2007-02-04 06:54:07 · 2 answers · asked by Mononkeneo 1

the degree of hot or cold, temperature or the degree of hot or cold and the temperature.


I would think it is the degree of hot or cold and the temperature but also know that the correct response may just be temperature.

2007-02-04 06:50:59 · 4 answers · asked by Anonymous

heit


higher than

lower than

the same as

higher than or lower than

2007-02-04 06:49:09 · 8 answers · asked by Anonymous

less than 70 kg, more than 70 kg, 70 kg, or other.

2007-02-04 06:47:25 · 9 answers · asked by Anonymous

2007-02-04 06:46:11 · 2 answers · asked by Anonymous

2007-02-04 06:42:25 · 2 answers · asked by nico 2

give me examples of some. thanks.

2007-02-04 06:41:00 · 2 answers · asked by Dan 2

in 1774, Joseph Priestly discovered oxygen when he heated solid mercury(II)oxide, HgO, and produced the element mercury and oxygen gas. Write and balance this equation.

2007-02-04 06:37:31 · 4 answers · asked by Anonymous

please help!!

2007-02-04 06:37:20 · 1 answers · asked by Xx_Booty_Shakin_Cheerleader_xX 1

A carbonated tonic drink has the pH value of 2.45 but this will be reduced when it's decarbonated. Why does this happen?

2007-02-04 06:32:25 · 1 answers · asked by hakunamatata 2

2007-02-04 06:20:53 · 14 answers · asked by susie 1

explain why C20H40 is a solid at 25 degrees while C4H8 is a gas at the same temperature

2007-02-04 06:16:41 · 4 answers · asked by cutie pie! 3

Methane (the gas farts are made of) is lighter than air. If you fart, you are getting rid of this gas so does it make you heavier or lighter?

2007-02-04 06:02:59 · 1 answers · asked by vinnymass 1

WHY DOES HYDROGEN HAVE SO MANY SPECTRAL LINES

2007-02-04 05:43:28 · 2 answers · asked by emmaderbs 1

The waters of the oceans contain many elements in trace amounts. Rubidium, for example, is present at the level of 2.2 nM (1 nM = 10^-9 M).What volume of seawater have to be processed to recover 510 kg of rubidium, assuming that the recovery process was 100% efficient?

2007-02-04 05:29:22 · 2 answers · asked by bollocks 2