Chemistry - April 2007

Help!!!

2007-04-28 07:14:01 · 1 answers · asked by harry p 1

2007-04-28 07:02:08 · 2 answers · asked by the_oleander_maiden 1

I need to find something in the house to convert the grams, but I don't know what to use or how to do it.

2007-04-28 06:59:13 · 2 answers · asked by sandysdachshund 3

Given the unbalanced equation: NaNo3-------NaNo2 + O2

2007-04-28 05:47:51 · 3 answers · asked by jere 1

how many moles of sodium chloride are produced?
Na + Cl2 ----- NaCl

2007-04-28 04:48:59 · 2 answers · asked by Katy J 1

to show change in temperature

2007-04-28 04:47:01 · 3 answers · asked by Anonymous

What is the mass of the gas if the temperature is 100.0 degrees celsius?

2007-04-28 04:37:05 · 3 answers · asked by im_all_about_spades2003 1

2007-04-28 04:14:05 · 6 answers · asked by Anonymous

OK, so one of the properties of transition metals is that they have different oxidation states, but - so do other metals, like sulphur????

Why would copper, a transition metal, have two oxides but calcium,a normal metal, form only one oxide?

2007-04-28 03:54:48 · 3 answers · asked by Anonymous

Ethers (general formula, R-O-R') have many important uses. Until recently, methyl tert-butyl ether (MTBE, see structure below) was used as an octane booster and fuel additive for gasoline. It increases the oxygen content of the fuel, which reduces CO emissions during winter months. MTBE is synthesized by reacting 2-methylpropene with methanol.
If the government required that auto fuel mixtures contain 2.8% by mass oxygen to reduce CO emissions, how many grams of MTBE would have to be added to each 100. g gasoline?

2007-04-28 03:52:56 · 2 answers · asked by prettyjuli2002 1

2007-04-28 03:34:28 · 2 answers · asked by Anonymous

could this polyer be prepared via this procedure subsituting sebacic acid for sebacoyl chloride?
this procedure means the reaction making nylon 6, 10 between sebacoyl chloride and hexamethylenediamine

2007-04-28 03:24:16 · 3 answers · asked by Anonymous

my answer is polyatomic ions and monatomic ions. Is it correct?

2007-04-28 03:16:02 · 9 answers · asked by loally 2

Choices: 6, 9, 4, 3, 2

2007-04-28 02:57:54 · 1 answers · asked by haji_kwang 1

The answers are:
a. NO3-
b. CO3 2-
c. Na+
d. NH4+

The book lists CO3 2- as the answer. Can someone tell me why salt is not soluble with this ion?

2007-04-28 02:18:02 · 3 answers · asked by Toothie 2

2007-04-28 02:04:02 · 2 answers · asked by Anonymous

2007-04-28 00:59:41 · 3 answers · asked by pratibha b 1

deflection caused by aluminium foil are less than that by gold foil in alpha particals,why?

2007-04-28 00:59:09 · 1 answers · asked by pratibha b 1

Wikipedia mentioned adding iron(III) chloride solution to the supposed acid results in a deeply red colour that disappears after acidification.

2007-04-27 23:20:01 · 5 answers · asked by Flashpoint182 2

elements?

2007-04-27 21:56:07 · 7 answers · asked by Anonymous

2007-04-27 21:53:36 · 4 answers · asked by Anonymous

0.1277g sample dissolved in 25ml toluene. If the mixture contained 2.14ppm of sulfur content, what is the sulfur level in sample?

2007-04-27 21:23:24 · 2 answers · asked by Amilea 1

2007-04-27 21:10:18 · 2 answers · asked by ahmed n 1

2007-04-27 21:01:52 · 2 answers · asked by Ben H 1

i am doing this assignment...and i need to know the top ten most aubundant elements and metals in the lithosphere????.in order from most abundant to least abundant.......need it quick...thanx

2007-04-27 20:45:38 · 3 answers · asked by Anonymous

the preparation of nylon is caried out with two solvents that do not dissolve in each other with one starting material in each of the solvents. the reaction occurs at the interface of the two solvents. why is it carried out in this way? what would the result be if one solvent that dissolved both reagents were used instead?

2007-04-27 20:41:56 · 4 answers · asked by Anonymous

why is the aqueous solution not added to the hexane solution?

2007-04-27 20:39:15 · 2 answers · asked by Anonymous

what is the percent yield of CuS for the following reaction given that you start with 15.5 grams of Na2S and 12.1 grams CuSO4? The actually amount of CuS produced was 3.05 grams Reaction: Na2S + CuSO4>>>Na2SO4 + CuS

2007-04-27 20:16:25 · 3 answers · asked by Anonymous

How many grams of aluminum oxide are produced according to the reaction below given that you start with 10.0 grams of Al and 19.0 grams of O2? Reaction 4Al + 3O2>>>2Al2O3

2007-04-27 20:12:10 · 2 answers · asked by Anonymous

Solve the mystery-----Why does expired air has more O2 & less CO2 than alveolar air?

2007-04-27 17:34:17 · 3 answers · asked by monty86 1