Number of results: 318
Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please show any work ...
Wednesday, May 16, 2007 at 1:11pm by bik
I need serious help on this....please help guys.. i've to turn it in in an hours... Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 Please do not post duplicates.
Wednesday, May 16, 2007 at 1:16pm by bik
Which element of group 3A behave as a nonmetal or semimetal?
Tuesday, April 22, 2008 at 7:23pm by tomas
You're probably thinking ob boron.
Tuesday, April 22, 2008 at 7:23pm by DrBob222
Can you show me how to convert/solve this problem? 27 micro grams = ? grams
Sunday, August 24, 2008 at 1:41pm by Lisa
divide 27 by one million.
Sunday, August 24, 2008 at 1:41pm by bobpursley
what are four components of the water molecule?
Monday, October 20, 2008 at 5:20pm by Anonymous
An aqueous solution containin 1 g of sorbitol in 100g water has a freezing point of 0.102 C. Elemental analysis indicates that sorbitol is 39.56% C, 7.75% H, and 52.7% O. What are the molar mass and the molecular formula of sorbitol? The Kf of water is 1.86 C/m.
Friday, October 24, 2008 at 11:20pm by Maria
Calculater the amount of heat in kilojoules released when 50 grams of steam at 125 C are converted to 50 grams of ice at -125 C?
Friday, October 24, 2008 at 11:22pm by Maria
q1 = heat released going from steam at 125 to steam at 100. q1 = mass steam x specific heat steam x delta T. q2 = heat released to condense steam at 100 to liquid water at 100. q2 = mass steam x heat vaporization. q3 = heat released going from water at 100 to water at zero. q3...
Friday, October 24, 2008 at 11:22pm by DrBob222
Two problems in one here. First, determine the molar mass from the freezing point. I'm sure you have made a typo; I think the freezing point should be -0.102 C and not +0.102 C. Use delta T = Kf*molality Calculate molality. Then knowing that the definition of molality is #mols...
Friday, October 24, 2008 at 11:20pm by DrBob222
How many pounds of carbon dioxide are produced from burning one gallon of gasoline? assume gasoline is 100%, and the density of octane is .78g/ml.
Saturday, October 25, 2008 at 12:16am by Roth
A 27.6 ml volume of chlorine gas is collected over water at 23 C and 750 torr. The mass of the gas is 78.4 mg. The vapor pressure of water is 21 torr. a) What is the pressure of the chlorine gas? b) How volume does the chlorine gas occupy? c) How many moles of chlorine gas are...
Saturday, October 25, 2008 at 12:19am by Roth
Write the equation and balance it. Convert 1 gallon octane to mL, then use the density to convert to grams. Convert grams octane to mols octane (mols octane = grams/molar mass). Using the coefficients in the balanced equation, convert mols octane to mols CO2. Convert mols CO2 ...
Saturday, October 25, 2008 at 12:16am by DrBob222
a). Total P = partial pressure chloring + partial pressure water vapor. You know total P and you know parital pressure of water vapor. Solve for partial pressure chlorine. b)I may have missed something but don't they tell you the volume is 27.6 mL? c)Use PV = nRT Post your ...
Saturday, October 25, 2008 at 12:19am by DrBob222
thanks DrBob222 I appreciated your help
Saturday, October 25, 2008 at 12:16am by Roth
Calculate the freezing point of a solution containing 12.2grams of benzoic acid, C6H5CO2H, dissolved in 250 grams of nitrobenzene, C6H5NO2. The freezing point of nitrobenzene is 7.7 C, and its freezing point depression constant is 7.0 C/m.
Sunday, October 26, 2008 at 5:38pm by Joshua help please
delta T = Kf*molality Remember molality = #mols/kg solvent. After you find delta T, then subtract that from 7.7 to find the freezing point of the solution.
Sunday, October 26, 2008 at 5:38pm by DrBob222
Diacetyl, a substance contributing to characteristic flavor and aroma of butter, consist of 55.8% C, 7.03% H, and 37.17% O. In the gaseous state at 100 C and 747 torr, a 0.30 gram sample occupies a volume of 111ml. What is the molacular formula of diacetyl?
Sunday, October 26, 2008 at 6:31pm by Aisha
Say we had 100 grams of this stuff Then that would be 55.8 g of C 7.03 g of H 37.17 g of O divide each by atomic weight to get ratio of atoms in molecule C --> 55.8/12 = 4.65 H --> 7.03/1 = 7.03 O --> 37.17/16 = 2.32 about three H for every O about two C for every O ...
Sunday, October 26, 2008 at 6:31pm by Damon