Chemistry - January 2007

My midterm is in 7 hours and I cant find the answer anywhere in my book! Please help... any is appreciated.

2007-01-10 15:39:21 · 3 answers · asked by Jon 1

2007-01-10 15:39:11 · 2 answers · asked by dirtyoldman 4

I'm trying to find out those questions in order to answer another question in my Chemistry class.

2007-01-10 15:26:17 · 5 answers · asked by laurens_odyssey 1

2007-01-10 15:23:24 · 4 answers · asked by lhyne d 1

Potassium chlorate is a rich source of oxygen. It decomposes upon heating to produce potassium chloride and oxygen. Write a correctly balanced equation for this reaction. (Use the smallest whole numbers possible. Type your answers using the format 2Ca(OH)2 for 2 Ca(OH)2.)

2007-01-10 15:03:42 · 3 answers · asked by Anonymous

2007-01-10 15:00:38 · 1 answers · asked by eddienel 1

How many grams of potassium chloride are dissolved to make 5.00 L of a 0.400 M solution? Use molar masses with at least as many significant figures as the data given.

2007-01-10 14:44:50 · 0 answers · asked by Anonymous

2007-01-10 14:43:02 · 2 answers · asked by ocean waters 1

2007-01-10 14:41:07 · 4 answers · asked by Anonymous

is it radon?

2007-01-10 14:40:39 · 2 answers · asked by Anonymous

It is also in the title of a play made famous by Betty Davis.

2007-01-10 14:39:08 · 2 answers · asked by Anonymous

2007-01-10 14:34:50 · 4 answers · asked by donna_c25 2

is it
sodium carbonate + oxygen --> sodium oxide + carbon dioxide
or
sodium carbonate + oxygen --> sodium oxide + carbonate

2007-01-10 14:31:58 · 2 answers · asked by Anonymous

how would you name MnCO3?
i know this: Manganese( ) Carbonate
how do you find out the roman numeral for the parthesis??
thanks!

2007-01-10 14:30:56 · 4 answers · asked by Stephanie 3

I need some help understanding basic skeleton equations (chemistry). anybody wanna explain,in plain english, how to do these little devils? or any websites that can alson explain?
thanks in advance.

2007-01-10 14:28:27 · 0 answers · asked by Anonymous

What volume of 1.00 M solution can be produced using 2.40 moles of NaCl??

2007-01-10 14:23:36 · 3 answers · asked by Anonymous

A compound with the empirical formula SF4 has a mass of 0.100-g at 20.0 degrees Celsius ans 1.02 atm, and a volume of 22.1 mL. What is the gas's molecular formula?

2007-01-10 14:06:54 · 3 answers · asked by Kim L 1

2007-01-10 14:05:56 · 3 answers · asked by AQ 1

For example, how would you find the charge of Au, and why/how? Thanks!

2007-01-10 14:01:19 · 2 answers · asked by little secrets † 2

Two identical flasks are filled with different gases; both the the flasks are maintained at the same pressure and temperature. The mass of has A is 0.340-g, while the mass of gas B is 0.480-g. Gas B is ozone, O3. Is gas A oxygen, sulfur dioxide or dihydrogen sulfide?

I know that I should probably have to find moles so I divided 0.340g by the molar mass of oxygen, sulfur dioxide, and dihydrogen sulfide, and got...
O=.02124mol
SO2=.0053mol
H2S=.00997mol

I'm really not sure where to go from there

2007-01-10 13:56:53 · 2 answers · asked by Kim L 1

Is a scientifc hypothesis accepted if the is no way to demonstrate that the hypothesis is wrong? Please explain!! im confused..

2007-01-10 13:44:17 · 6 answers · asked by The REBELution! 3

help me please

2007-01-10 13:41:22 · 2 answers · asked by Anonymous

Pertaining to my previous question on poisonous pill, I will ask it in a may be clearer way.
Weighing can only be done ONCE, using a digital scale.
All the pills are the same size, same color.
There are 10 bottles with 10 pills in each bottle.
One of the bottles contain a pill that is poisonous.
Non-poisonous pill weigh 10 gram each and poisonous pill weighs 11gram (1 gram heavier than the normal ones).
So how can you find out which bottle has the poisonous pill in it?

2007-01-10 13:36:39 · 7 answers · asked by lwc 2

i need help finding it!

2007-01-10 13:30:07 · 5 answers · asked by Anonymous

How?

2007-01-10 13:10:05 · 5 answers · asked by Anonymous

help

2007-01-10 13:00:26 · 1 answers · asked by Anonymous

2007-01-10 12:59:13 · 4 answers · asked by ♪♫♥photographer♥♫♪ 2

There are 10 bottles with 10 pills inside. There is a poisonous pill in one of the bottles. Each pill weigh 10g but the poisonous pill weigh 11g. Using a digital weighing scale and you can only weigh one time. How to find out which bottle contain the poisonous pill?

2007-01-10 12:57:33 · 14 answers · asked by lwc 2

i have to do a project for science and i need to know the answer to what i am asking

2007-01-10 12:49:01 · 3 answers · asked by Angels Eyes 2

Determine the # of moles of each type or ion in one mole of the following compound. Determine the # of moles of each atom present in ine mole of the ion
a. KNO3

b. Na2SO4

2007-01-10 12:29:44 · 2 answers · asked by Meno 1