Chemistry - November 2007

Hi,

What would happen if chlorine water was added to an aqueous solution of sodium chloride? Would there be no reaction?

Cl2 + NaCl --> ?

Thanks!

2007-11-08 02:35:19 · 3 answers · asked by Anonymous

The enthalpy of combustion of octane, C8H18, one of the major components of gasoline, is 5463 kJ/mole or 48 kJ/g. The density of octane is 0.70g/mL.

If your chemistry teacher's car requires approximately 10 L of octane in order to travel 100 km, how much energy does it require to travel 100 km?

2007-11-07 23:51:48 · 2 answers · asked by Anonymous

The enthalpy of combustion of octane, C8H18, one of the major components of gasoline, is 5463 kJ/mole or 48 kJ/g. The density of octane is 0.70g/mL.

If your chemistry teacher's car requires approximately 10 L of octane in order to travel 100 km, how much energy does it require to travel 100 km?

2007-11-07 23:48:53 · 1 answers · asked by Anonymous

elements or sumthing... it was ask during our board exam?

2007-11-07 23:46:09 · 5 answers · asked by Adonis O 1

If 5g of butter are burned in a calorimeter containing 1 L of water (density of water is 1g/mL), the temperature of the water rises from 21°C to 66°C. determine the amount of energy that is transferred to the water.

2007-11-07 23:00:07 · 2 answers · asked by Anonymous

On complete combustion, 4.0g of a hydrocarbon give 11.0g of carbon dioxide and 9.0g of water.

What is the formula of the hydrocarbon?

(1) CH4
(2) C2H4
(3) C2H6
(4) C3H8

The answer is (1) CH4..why? I don't understand...please explain..thanks.

2007-11-07 22:44:19 · 4 answers · asked by ♪£yricảl♪ 4

temp also a type of energy then why its incresing

2007-11-07 22:18:49 · 4 answers · asked by Anonymous

What are the procedures and materials? The chalk should be able to write well in blackboards. Please explain.

2007-11-07 22:05:50 · 1 answers · asked by elvesrattackingme 2

use that particle theory to explain how a substance dissolves.

2007-11-07 21:58:02 · 2 answers · asked by Anonymous

It says to fill in the following table, and says C=\v ( \ = wavelength symbol on here) where c = 10^8 m/sec and wants me to give my answers using scientific notation( how would i figure these out what would i have to do)? please help
also the website shows the ws Fill in the blank i tried to do this but was to hard please help this is the worksheet (www.chemadventure.com/5ws5.3.planckscon... (wont let me put the whole URL but add stantworksheet.doc to the end of con)

Example: wave = 3.9x10^-7m, v = 7.7x 10^14 s^1, e = 5.1x10^-19j (idk how to get those here r the problems

1. Fill wave and e given: v = 1.0x10^13 s^-1
2. fill in v and e given: 3.0x10^-4 m = wave
3. fill in wave and e given v= 2.0 x 10^22 s^-1
4. fill in v and e given wave = 2.0 x 10^ -2 m
5. fill in wave and e given: v = 1x 10^7 s^-1
6. fill in v and e given wave = 2.0x10^-10 m
7. fill in wave and e given v= 1.005 x 10^6 s^-1
8. fill in v and e given: wave = 9.052x 10^-6m

please help with this

2007-11-07 21:30:17 · 1 answers · asked by Anonymous

and what are, if any examples?

2007-11-07 21:12:23 · 2 answers · asked by kammyno1manufan 1

need as much detail as possible

2007-11-07 20:47:17 · 3 answers · asked by Anonymous

The following three solutions were combined:
1. 49.1 mL of 0.087 M hydrochloric acid.
2. 41.4 mL of 0.072 M nitric acid.
3. 10.4 mL of 0.027 M sodium hydroxide.
What is the concentration of H+ in the mixture? Express your answer in mM (1000 mM = 1 M).

2007-11-07 18:33:33 · 2 answers · asked by David R 1

Please show me how to do the problem.

2007-11-07 18:28:21 · 1 answers · asked by Anonymous

calcium hydroxide, how many grams of sodium hydroxide are formed?

Na2CO3 + Ca(OH) 2 -------> NaOH + CaCO3,
the answer is 90.4 grams, how do i get this?
thanks

2007-11-07 18:04:59 · 4 answers · asked by Boo Radley 4

So my problem says that gold can be oxidized by bromine triflouride. This apparently all happens according to the following redox reaction: 2Au + 2BrF3 + 2KF ---> 2KauF4 + Br2. Say these 3 reactants were all mixed together into equal masses giving it a total mass of 39.2 g. How many grams of KAuF4 were produced from this? Can anyone help me?

2007-11-07 17:34:02 · 2 answers · asked by David R 1

The density of a bottle of concentrated HCl has a density of 1.2g/ml and contains 36% of HCl. what is the molarity and molality of HCl in this solution?

2007-11-07 17:31:43 · 3 answers · asked by Anonymous

How would I calculate the minimum volume (in milliteters) of O.468 M of hydrochloric acid that would be necessary to completely dissolve 1.19 grams of aluminum hydroxide. Any ideas? Thanks for any help.

2007-11-07 17:30:10 · 3 answers · asked by Christine O 1

2007-11-07 16:45:12 · 3 answers · asked by caro 1

How many kg of carbon dioxide are produced when 150 kg of glucose (C6H12O6) are fermented? C6H12O6->2C2H5OH + 2CO2.

2007-11-07 16:05:45 · 3 answers · asked by boazchic07 2

if an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? what is the name of this element?

2007-11-07 16:03:21 · 8 answers · asked by Geanine J 1

2007-11-07 14:45:40 · 4 answers · asked by Anonymous

2007-11-07 14:09:43 · 1 answers · asked by The Magnificent Pinky Ringy 1

A 27.0 g sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 g of carbon dioxide and 27.0 grams of water. What is a possible molecular formula for the hydrocarbon?

A. CH4
B. C2H2
C. C4H3
D. C4H6
E. C4H10

2007-11-07 13:45:27 · 2 answers · asked by Anonymous

sixty liters of a gas were collected over water when the barometer read 670 mm Hg and the temperature was 20 degrees celsius. What volume would the dry gas occupy at standard conditions?

2007-11-07 13:40:07 · 2 answers · asked by cal 123 1

i have the reactants but i cannot figure out the product.

HC2H3+ NaHCO3----->

can someone help?

2007-11-07 13:36:06 · 2 answers · asked by Anonymous

can anyone answer that? I know someone posted 5 of them already but I wasn't sure if that was all of them so if anyone knows how to do this and could post EVERY isomer of C4H8, that would be great

2007-11-07 13:06:57 · 2 answers · asked by MD12 2

describe a method that you could use to obtain MgSO4 from MgSO4*7H2O

* means times like multiply!

2007-11-07 13:03:04 · 2 answers · asked by manny 1

2007-11-07 13:02:46 · 1 answers · asked by gigi90232 2

A)CoSO4
B)Mn(NO3)2
E)CoSO4 *7H20

2007-11-07 12:47:15 · 3 answers · asked by manny 1