Chemistry - May 2007

2007-05-31 02:30:46 · 9 answers · asked by Anonymous

When using the ideal gas law equation, we sometimes need to use stoichiometry first to convert a known to the appropriate value to plug into the gas law equation.

True or false?

2007-05-31 02:27:29 · 6 answers · asked by Anonymous

1. Descriptions of chemical reactions:
i) Write a word eqation for the reaction
ii) With the aid of a valency table, write the correct chemical formula for each substance in the equation
iii) Balance the euqation by placing coeffients(number) in front of the formulae.

a>- Magnesium cabonate when heated forms magnesium oxide and carbon dioxide.
b>- Sulfur is burnt in oxyfgen to produce sulfur dioxide.
c>- Methane (CH4) is burnt in oxygen to produce carbon dioxide and water.
d>- Silver metal is reacted with gold nitrate to produce gold metal and silver nitrate.
e>- Aluminium metal dissolves in hydrochloric acid to produce hydrogen gas and aluminium chloride.
f>- Barium chloride and sodium sulfate solutions are mixed producing a white barium sulfate prexitate in a sodium chloride solution.
g>- Sulfuric acid is neutralised by sodium hydroxide to form sodium sulfate and water.
h>- Hydrochloric acid reacts with sodium bicarbonate to produce sodium chloride, water and carbon dioxide.

Thx!

2007-05-31 01:42:15 · 2 answers · asked by vivilovy 1

Iam mixing a ratio of 30 ml solution with 800 ml of water now i want the same ratio but only 500 ml of water how do i find that and keep my mixture the same

2007-05-31 01:21:01 · 6 answers · asked by xrayman1987 2

Acids are (covalent, ionic) _______ compounds and the molecules are (nonpolar, polar) _______ in character

2007-05-31 01:01:01 · 3 answers · asked by Anonymous

When unsaturated aqueous solutions of sodium nitrate and potassium chloride are mixed, the molecular and ionic dpecies present in the resulting mixture are ________, _________, __________, ___________, _________,
_________, and ____________.

2007-05-31 00:41:37 · 1 answers · asked by Anonymous

2007-05-31 00:19:12 · 1 answers · asked by Anonymous

Compund A is a Branched chain hydrocarbon with formula C5H10 – When A is hydrated Compund B, C5H12 is formed. B is oxidised by acidified potassium dichromate to C which has formula C5H12O

Draw and name
Write equation for each reaction

please email answers to original_ndn@hotmail.com

2007-05-30 23:40:28 · 1 answers · asked by Anonymous

2007-05-30 23:39:04 · 1 answers · asked by Anonymous

2007-05-30 23:00:37 · 1 answers · asked by Anonymous

with information on Preparation, properties and application

2007-05-30 23:00:32 · 1 answers · asked by Anonymous

Ozonolysis of a hydrocarbon A produced compounds B and C, both of which have the formula C3H5O. Compind B can be made by oxidation of a secondary alcohol, while compound C is easily oxdised to compound D, C3H6O2

Draw structures and give names for compounds A, B, C and D

If you have answer please send to original_ndn@hotmail.com
first correct answer will get best answer.

2007-05-30 22:57:33 · 2 answers · asked by Anonymous

given the information:
Peak Width = 0.12min
Retention time = 1.3min
Flow Rate = 1.0ml/min

2007-05-30 22:53:54 · 1 answers · asked by Anonymous

2007-05-30 22:28:46 · 6 answers · asked by deepika t 1

if 30.10 mL of .500 M H2SO4 is required to reach the end point when titrated against 10.00mL of the NaOH solution?
The balanced chemical equation for this neutralization is-

H2SO4 + 2 NaOH ---> Na2SO4 + 2 H2O

Thank you for your help.

2007-05-30 22:27:10 · 5 answers · asked by T-Rex84 1

chemistry

2007-05-30 22:19:47 · 2 answers · asked by rb_1213 1

From an energy standpoint, or from a practicality standpoint.

2007-05-30 21:53:03 · 1 answers · asked by Jeremy 2

please give me a comprehensive ans

2007-05-30 21:07:12 · 4 answers · asked by genius 1

2007-05-30 20:52:18 · 2 answers · asked by ? 1

hi,i need this answer for my stoichemistry of glycolysis in yeast experiment...hope u can help me to slove this question.thanx..

2007-05-30 20:46:01 · 1 answers · asked by Anonymous

hi,i need this answer for my lab report..it's describe in chemistry aspect..hope u can help me solve this question...thanx!

2007-05-30 20:34:53 · 1 answers · asked by Anonymous

2007-05-30 20:28:07 · 1 answers · asked by Anonymous

experiments related to vitamins or dyes,etc....

2007-05-30 19:36:03 · 1 answers · asked by Anonymous

I cannot for the life of me remember how to calculate the minimum amount of solvent required for a crystallization/purification problem. How much 95% ethyl alcohol is required to dissolve 0.1g of sulfanilamide (C6H8N2O2S) at 78 degrees Celsius?

2007-05-30 19:10:49 · 1 answers · asked by tyguy_hi 1

a 0.500L solution of 700M hydrochloric acid is used to netralized a 250.0g sample of calcium hydroxyde. calcium chloride , a chemical that is used to control highway dust, strengthen concrete mixes and add flavor to foods, is produced by the reaction.

2007-05-30 18:39:30 · 4 answers · asked by analiz o 1

like as in quantity.
can you give me ratios of the quantity of ammonium to the quantity of silver or something like that. thanks
all it says is that i need 15M of concentrated Ammonium

2007-05-30 18:19:41 · 3 answers · asked by Anonymous

1) Calculate the pH of .00042 M HAc
Are there 2 answers?
Is the answer -3.66 and -5.45?
2) Mixture of 0.080 M NaCH3CO2 with 0.030 M HAc pH=?
(I need help with this one)

2007-05-30 18:14:20 · 3 answers · asked by Anonymous

usually, when leaves are grinded for extracts, sand is used... What is its purpose?

2007-05-30 18:04:23 · 1 answers · asked by abz 1

(That do not reqiure exstreamly high temps to stay in liquid state)

2007-05-30 17:05:25 · 3 answers · asked by Mike 2

My coin turned blue. Any explanation?

2007-05-30 16:31:17 · 1 answers · asked by Anonymous