Saturday
April 19, 2014

Search: when heated, N2O4 dissociates as follows: N2O4 = 2NO2

Number of results: 1,860

Chemistry
I answered this same question for someone earlier but I can't find it. I think I erred in that post because I don't know the reaction. What are the conditions under which the loss of CO2 occurred? Is that a titration experiment or was the tablet heated? If heated, at what T?
Friday, October 19, 2012 at 10:08pm by DrBob222

11th grade
how do i solve this thermochemical equation? and what r the steps to it 1. Find the heat of reaction for the following equation. N2(g) + 2 O2(g) -> N2O4(g) given the following steps 2NO2(g) -> N2(g)+ 2O2(g) delta H=-84.8 kj N2O4(g)-> 2NO2(g) delta H= 72.8 kj if you ...
Saturday, November 21, 2009 at 1:55pm by dawson

Chemistry
initial moles N2O4 = grams/molar mass = 92.01/92.01 = 1.00 moles. .............N2O4 ==> 2NO2 initial.......1.0......0 change.........-x......2x equil.......1-x........2x and that answers #1. I don't know if you want a number or not but that can be obtained after you finish ...
Thursday, August 4, 2011 at 10:47am by DrBob222

phys. science
when most matter is heated it expands right? & doesnt water expand when it is heated? & what is the diff. b/w thermal conductor and thermal insulator? & in which direction will heat spontaneously flow?
Thursday, May 15, 2008 at 7:43pm by leann

chemistry
Much of the brown haze hanging over large cities is nitrogen dioxide, NO2(g). Nitrogen dioxide reacts to form dinitrogen tetroxide, N2O4(g), according to the equilibrium. 2NO2(g) N2O4(g) + 57.2 kJ (brown) (coulorless) Use this equilibrium to explain why the brownish haze over ...
Monday, March 31, 2008 at 7:14am by ChemMaster98

Chemistry
Dinitrogen tetroxide decomposes according to N2O4 (g) = 2NO2 (g) In a certain experiment, N2O4(g) at an initial pressure of 0.554 bar is introduced into an empty reaction container; after equilibrium is established, the total pressure is 0.770 bar. A quantity of NO2(g) is ...
Monday, March 19, 2012 at 10:40pm by Angel

chemistry
Hydrazine has the molecular formula N2H4 and is a volatile colourless liquid often used in industrial processes and as a rocket fuel. It has a single NN bond in its structural formula. When hydrazine is heated it produces ammonia (NH3) and nitrogen (N2) gases. When used to ...
Tuesday, January 25, 2011 at 4:53am by rebecca niles

CHEMISTRY HELP NEEDED A.S.A.P
Given: N2O4 (g) 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
Thursday, April 22, 2010 at 2:38am by Frank

Chemistry (equilibrium)
In the following equilibrium system, N2O4(g) <--> NO2(g), what happens to the color of the gas if the forward reaction speeds up? What happens if the reverse reaction speeds up? What happens if the forward and reverse reaction happen at the same time? NO2 is a reddish-...
Sunday, April 1, 2007 at 2:33pm by abby

CHEMISTRY HELP DESPERATELY NEEDDED!!!
Given: N2O4 (g) 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
Wednesday, April 21, 2010 at 11:24pm by Frank

CHEMISTRY HELP STILL NEEDED PLEASE!!!
Given: N2O4 (g) 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
Thursday, April 22, 2010 at 12:52am by Frank

chemistry
Use Hess's law and the following equations to calculate H for the reaction N2(g) + 2O2(g) N2O4(g). 2NO2(g)->N2O4(g) H = 57.0 kJ/mol N2(g)+O2(g)->2NO(g) H = 180.6 kJ/mol 2NO2(g)->2NO(g)+O2(gH = 114.4 kJ/mol
Monday, May 14, 2012 at 2:15pm by princess cunningham

dangling modifiers
If your baby does not like cold apple juice, it should be heated. That isn't really a dangling modifier because "it should be heated" comes directly after "juice." However, to make the sentence clearer, you could say, Apple juice should be heated if your baby doesn't like it ...
Friday, July 13, 2007 at 12:21pm by tanya

AP Chemistry
It is the second way. And one problem I am having (I looked at your post last night but didn't post a response) is I can't really tell which way the reaction is going since the arrows seem to be backwards to me. If I write an equation I usually write it forward. Of course I ...
Thursday, April 22, 2010 at 5:20pm by DrBob222

Chemistry!
1 mol N2O4 has ?P. Use PV = nRT. I obtained approximately 5 atm but you need to do it exactly. 2 mol NO2 = ?P. Same thing. I get approximately 10 atm. ............N2O4 ==> 2NO2 initial.....5..........10 change......+p..........-2p equl.......5-p..........10-2p How do you ...
Sunday, February 12, 2012 at 6:28pm by DrBob222

Chem104
for each mole of PCL5 which dissociates, how many moles of CL2 are produced
Saturday, June 4, 2011 at 1:35am by bec

Chemistry
When heated, lithium reacts with nitrogen to form lithium nitride: 6Li+N2 --> 2Li3N What is the theoretical yield of Li3N in grams when 12.4 g of Li is heated with 33.9g of N2
Saturday, June 12, 2010 at 10:23pm by Jerry

chemistry
P*molar mass = d*RT Substitute and solve for the "average molar mass" of the mixture. d in the above formula is density in g/L. Then let X = fraction that is NO2 1-X = fraction that is N2O4 ------------------- X(molar mass NO2) + (1-X)(molar mass N2O4) = avg molar mass mixture...
Sunday, November 18, 2012 at 1:43am by DrBob222

Chemistry
When an unknown substance weighing 2.386g is heated for 5 minutes and cooled to room temperature, it's new weight is 3.183g. No smoke rose for the sample while it was heated and it turned from white to a slight yellow. Were the students performing this experiment successful at...
Sunday, January 23, 2011 at 4:58pm by Mogran

Chemistry Inorganic
What rationale is there for the mixing of sulfuric acid aqueous and water being exothermic but the mixing of solid ammonium chloride with water to be endothermic? Solid NH4CL dissociates in water, and the dissociation process requires some energy, because the NH4+ - Cl- ionic ...
Tuesday, July 31, 2007 at 4:25am by Vic

chemistry
Identify the true statement(s) regarding the entropy of chemical substances. a. Two moles of a substance at temperature T and pressure p has twice the entropy of one mole of the same substance at the same temperature and pressure. b. Precipitation reactions are typically ...
Sunday, November 23, 2008 at 1:05am by Anonymous

chemistry
When heated, CaCO3 decomposes as follows: CaCO3 (s) = CO2 (g) +CaO (s) in an experiment, 10.00 g of CaCO3 was placed in a .500 L container, and when it was heated to a constant temperature, 50% of the solid decomposed. What is the value of Kc for this reaction under these ...
Thursday, November 4, 2010 at 5:14pm by Rory

Chemistry
No. It has a hydrogen in it that dissociates (at least some). Aprotic means it doesn't have a H.
Sunday, January 23, 2011 at 12:58pm by DrBob222

Chemistry
N2O4(g) 2 NO2(g) The ΔH for the reaction above is +57.2 kJ. The system is initially at equilibrium. Which of the following changes will favor the reverse reaction? NO2 is removed. N2O4 is removed. A catalyst is added. The temperature is increased. The temperature is ...
Saturday, March 12, 2011 at 1:33pm by pat

To GK
I disagree with this answer.:-) Everything you say is true about the KClO3/KCl; however, the question isn't asked that way. The question is, "How can we tall if all of the KClO3 has decomposed?" That means we have already driven the oxygen away and we are left with mostly KCl...
Monday, March 29, 2010 at 6:18pm by DrBob222

Chemistry
The energy used to power one of the Apollo lunar missions was supplied by the following overall reaction: 2N2H4 + (CH3)2N2H2 + 3N2O4 -> 6N2 + 2CO2 + 8H2O For the phase of the lunar module ascended from the surface of the moon, a total of 1200kg N2H4 was available to react ...
Sunday, February 6, 2011 at 10:25pm by Jessica

Chemistry
[N2O4] = 0.0250 M. What is the value of Keq
Friday, March 18, 2011 at 6:30pm by NANA

Chemistry
When the rate of the reaction 2NO+O2=2NO2 was studied, the rate was found to double when the O2 concentration alone was doubled but to quadruple when the NO concentration alone was doubled. Which of the following mechanisms accounts for these observations? a.) Step 1: NO + O2=...
Sunday, March 16, 2014 at 11:45am by Anonymous

AP Chemistry
Given: N2O4 (g) 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
Thursday, April 22, 2010 at 5:20pm by Frank

science
Based on the reactivity series, decide whether the following reaction will occur. If you think there will be no reaction, write down why you think this. If you think a reaction will happen, write down why you think it will happen, and the word equation to go with it. a) iron ...
Monday, June 27, 2011 at 10:32am by ishaan

chem
Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At equilibrium there is still ...
Thursday, May 13, 2010 at 11:05pm by jake

AP Chemistry
Given: N2O4 (g) 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
Thursday, April 22, 2010 at 10:33pm by Frank

chemistry
When potassium chlorate is heated, it decomposes into potassium chloride and oxygen in the reaction 2KCIO3 -> 2KCI + 3O2. How much oxygen is liberated when 50 g of potassium chlorate is heated?
Saturday, November 26, 2011 at 7:35pm by Tammy

college chem
Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At equilibrium there is still ...
Tuesday, May 18, 2010 at 12:06pm by jake

Science
An electrolyte dissolves and dissociates in water to form positive and negative ions. Propane gas does not do that. The others do.
Thursday, May 1, 2008 at 10:16am by drwls

Chem
No. NaCl dissociates as does MgCl2 as does CaCl2. Table sugar is the only one you have listed that does NOT dissociate.
Tuesday, August 25, 2009 at 10:30pm by DrBob222

Chemistry
Isn't the rate of appearance of N2O4 just 1/2 that of disappearance of NO2?
Tuesday, May 19, 2009 at 11:14pm by DrBob222

Chemistry
It's N2O4. I'm doing the same quiz right now lol.
Sunday, October 25, 2009 at 5:22pm by Anon

Chemistry
What is the equilibrium constant of the reaction 2NO2 (g) with 3.0 M and N2O4 with 2.5M
Tuesday, December 15, 2009 at 10:01am by John David

chemistry
what does it mean when it says the percentage of the original N2O4 that is dissociated.
Wednesday, April 14, 2010 at 10:43pm by confused

chemistry
I would go with N2O4. Is that a guess or do you know how to work the problem?
Tuesday, October 19, 2010 at 7:49pm by DrBob222

chemistry
what are the names of the following compounds: BF3 N2O4 P4S7?
Tuesday, November 16, 2010 at 9:53pm by Nona

Chemistry
What is the rate law of the reaction 2NO2 gives N2O4?
Wednesday, February 16, 2011 at 9:22pm by Sam

chemistry
What is the rate law for N2O4+CO yields NO+CO2+NO2?
Wednesday, February 16, 2011 at 9:25pm by Jason

physics
A copper plate has a hole cut in its center. When the plate is heated, the hole gets smaller. When heat is added to a system, the temperature must rise. When the pendulum of a grandfather clock is heated, the clock runs more slowly. Cold objects do not radiate heat energy. ...
Monday, April 16, 2012 at 10:42am by anonymous

Chem
Which compound does not dissociate a. table sugar b. NaCl C. MgCl2 D. CaCl2 I say b becasue it dissociates 90%, right?
Tuesday, August 25, 2009 at 10:30pm by Sammy

Chemistry
a 2.16g sample of Pb(NO3)2 is heated in an evacuated cylinder with a volume of 1.18L. the salt decomposes when heated: 2Pb(NO3)2 (s)_> 2PbO (s) +4NO2 (g) +O2 (g) Assuming complete decomposition, what is the pressure in the cylinder after decomposition and cooling to a final...
Tuesday, January 3, 2012 at 5:16am by mary

chemistry
How many moles of N atoms are in 4.70 mol of dinitrogen tetraoxide (N2O4)
Monday, June 20, 2011 at 4:58pm by Anonymous

SCIENCE
As NO2 solidifies, it becomes N2O4 and the electronic properites change.
Wednesday, October 17, 2012 at 5:18am by drwls

physics
A diatomic ideal gas is heated at constant volume until its pressure becomes 3 times.it is again heated at constant pressure until its volume is doubled.find the molar heat capacity for the whole process?
Thursday, May 16, 2013 at 3:46am by dukesouvik

physics
A diatomic ideal gas is heated at constant volume until its pressure becomes 3 times.it is again heated at constant pressure until its volume is doubled.find the molar heat capacity for the whole process?
Thursday, May 16, 2013 at 3:49am by dukesouvik

physics(HELP..)
A diatomic ideal gas is heated at constant volume until its pressure becomes 3 times.it is again heated at constant pressure until its volume is doubled.find the molar heat capacity for the whole process?
Thursday, May 16, 2013 at 3:49am by dukesouvik

CHEMISTRY
A diatomic ideal gas is heated at constant volume until its pressure becomes 3 times.it is again heated at constant pressure until its volume is doubled.find the molar heat capacity for the whole process?
Thursday, May 16, 2013 at 3:50am by dukesouvik

Chemistry
A hot air balloon is filled with 1.39 106 L of an ideal gas on a cool morning (11 C). The air is heated to 105 C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.
Tuesday, October 16, 2012 at 10:09pm by Bill

Chemistry
Which formula represents a molecular compound? (1) Kr 3) N2O4 (2) LiOH (4) NaI How do you know?
Wednesday, November 10, 2010 at 11:28pm by danny123

chemistry
2C2H5(NH2)CO2H + 12O2 --> N2O4 + 4CO2 + 8H2O
Wednesday, September 21, 2011 at 3:30pm by Edith

chem131
if the equilibrium mixture contains 0.100M NO2, and N2O4 is 4.6 x 10-3 what is the concentration?
Tuesday, November 20, 2012 at 9:50pm by Anonymous

Chemistry
How do I balance the following reaction in acidic conditions? N2O4 + S8 = NO + H2SO3????
Tuesday, March 11, 2014 at 11:35am by Nicole

Chemistry
Joseph Priestly discovered oxygen when he heated a red powder. This red powder had been prepared by heating mercury in air. a) name th red powder formed when this element is heated in air b) write a word equation to show what happens to this red powder when it is strongly ...
Sunday, December 3, 2006 at 7:07am by Jessica

AP Chem
At a particular temperature, Kp = 0.25 for the following reaction. N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an initial pressure of 5.3 atm is allowed to reach equilibrium. Calculate the equilibrium partial pressures of the gases. (b) A flask containing only NO2 at ...
Sunday, January 8, 2012 at 6:29pm by Bill

Math
Using Netwon Law of Cool, the graph of T(t)=S+(T subscript --S)e^kt approaches a horizontal asymptote.What does the asymtote describe? a) intial temperature of the heated object b) temperature of the surrounding environment c) the difference in the temparture of the heated ...
Tuesday, November 16, 2010 at 7:38am by Frank

Help Please! Science
stomach acid completly dissociates into H+ ions,but tomatores contain organic acids, which hardly dissociate at all.
Sunday, January 27, 2013 at 10:51pm by bobpursley

chemistry
A crystalline material containing 30 grams of barium chloride crystals was placed into an oven at 400 degrees c and heated for two hours. It was then cooled and weighed. the new mass was less than before it was heated, containing 20 grams if barium chloride. How is this possible?
Thursday, January 27, 2011 at 11:15pm by eric

Physical Science
The refrigerated one will be smaller. The heated one will be larger. Air (any gas) occupies a smaller volume when it is cooled and a larger volume when it is heated.
Sunday, September 27, 2009 at 11:51pm by DrBob222

Chemistry
When the rate of the reaction 2NO+O2=2NO2 was studied, the rate was found to double when the O2 concentration alone was doubled but to quadruple when the NO concentration alone was doubled. Which of the following mechanisms accounts for these observations? a.) Step 1: NO + O2=...
Friday, March 14, 2014 at 3:10pm by Anonymous

Chemistry
What are you having trouble with? The question tells you how the atoms are combined. For example, a is CaI2. b is N2O4.
Thursday, July 1, 2010 at 4:13pm by DrBob222

Electricity and Electronics
electrons are emitted from a conductor when the conductor is? heated? I can think of a lot of words that would go here. You really haven't given us much to go on. From the context of your question and how it relates to what you are studying, give us some choices if you don't ...
Thursday, June 15, 2006 at 11:39pm by jackie

Chemistry....Please help
Given the equilibrium constant values: 1.N2(g)+ 1/2O2(g)<---> N2O(g) KC=2.7*10^{-18} 2.N2O4(g)<----> 2NO2(g) KC= 4.6*10^{-3} 3. 1/2N2(g)+ O2(g)<----> NO2(g) KC=4.1*10^{-9} ----------------------------- 2N2O(g)+ 3O2 (g) <----> 2N2O4(g) I need help i dunt...
Sunday, February 8, 2009 at 3:29pm by Saira

Chemistry
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3 must must heated?
Sunday, September 27, 2009 at 10:37pm by Telicia

Chemistry
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3 must must heated?
Tuesday, September 29, 2009 at 7:12pm by Telicia

Chemistry
A leavening agent used in some older recipes is baking ammonia or ammonium bicarbonate. As it is heated, it breaks down into three gases- ammonia, water, and carbon dioxide. For each 20g of baking ammonia heated, how many grams of carbon dioxide are released?
Sunday, October 4, 2009 at 11:25pm by Anonymous

Chemistry
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)--> 2K2O(s) + 2N2(g) + 5O2(g) To produce 56.6 kg of oxygen, how many (a) moles of KNO3 must be heated? (b) Grams of KNO3 must must heated?
Sunday, June 17, 2012 at 7:31pm by B

chemistry
If 10.0 g of CaCO3(s) is heated, 5.61 grams of solid CaO will remain (4.39 g CO2 gas is driven off) If 3.25 g of NaCl(s), which does not undergo decomposition, is mixed with 5.30 g of CaCO3(s) and the mixture is heated long enough to decompose all of the calcium carbonate, how...
Thursday, September 9, 2010 at 9:54pm by Keenan Flemming

Chemistry
I would do this. ............N2O4 ==> 2NO2 initial..0.554.........0 change....-p..........+2p equil....0.554-p.......2p Total P @ equil = 0.770; therefore, 0.554-p+2p = 0.770 and this allows you to calculate Kp. NO2 is injected to make Ptotal = 0.906 bar so that makes 0.906...
Monday, March 19, 2012 at 10:40pm by DrBob222

Read Y9 chemistry
4. Lead dioxide gives off a gas when heated. The gas relights a glowing splint. Give the name of this gas. 5. Hydrated cobalt chloride are dark red crystals. Give twoobservations you would make (what you would see) when these crystals are heated.
Wednesday, September 10, 2008 at 11:05am by Moira

chemistry
Write the balanced equation for the combustion of C2H5(NH2)CO2H . The nitrogen is converted to N2O4
Wednesday, September 21, 2011 at 3:30pm by joan

chemistry
calculate the standard enthalpy change for each of the following reactions. N2O4(g)+4H2(g)=N2(g)+4H2O(g)
Thursday, November 29, 2007 at 5:30pm by karen

chem
calculate the standard enthalpy change for each of the following reactions. N2O4(g)+4H2(g)=N2(g)+4H2O(g)
Sunday, March 4, 2012 at 5:12pm by karen

Chemistry
Is this right? a) kc= [N2O4]/[NO2]^2 =(1.15)/(2)^2 =0.2875? B) I still can't figure it out :( please help
Sunday, April 8, 2012 at 4:50pm by Anonymous

Science
sugar dissociates to form -OH ends on the molecules, which form hydrogen bonds with water. Oil does not.
Tuesday, November 16, 2010 at 7:34pm by bobpursley

Chemistry Acid/bases
If the sulfuric acid COMPLETELY dissociates, then the hydrogen ion concentration is 2*M (there are two H in H2SO4).
Tuesday, February 10, 2009 at 8:11pm by bobpursley

Chemistry
What happens to iron sulphide when heated an what happens to iron when heated?
Sunday, February 8, 2009 at 9:21am by Liza

Chemistry
Consider the following balanced equation: 2N2H4(g)+N2O4(g)→3N2(g)+4H2O(g) Complete the following table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, ...
Wednesday, March 5, 2014 at 11:03pm by Carter

Chemistry
Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
Tuesday, May 10, 2011 at 8:14pm by JRoussel

Chemistry
Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
Tuesday, May 10, 2011 at 9:15pm by Janey

Chemistry
Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
Tuesday, May 10, 2011 at 10:24pm by Kynlee

chemistry
Which solutions has more sodium (assuming all Na dissociates in all cases) .50 M NaCl or 5%(w/v) CH3COONa)
Sunday, February 13, 2011 at 9:55am by Hewey

Chemistry
A 108g piece of unknown metal is heated to 100 degrees C in boiling water. The heated sample of metal is then dropped into 50ml of H20, which is initially at 23.0 degrees C. After a few minutes the temp. of water raises to 37.5 degrees C. What is the specific heat capacity of ...
Saturday, May 14, 2011 at 10:36pm by Lesley

Chemistry
Please help me....are these questions right or no? If not can you help me...any suggestions please? 7.(14). Which of the following is a salt? a. HNO3 b. H2SO4 c. CaSO4 d. NaOH e. NH3 I put down C- CaSO4, is that right or am I way off track? 8.(15). Which of the following is a ...
Tuesday, October 6, 2009 at 1:57pm by Taylor

Portland State
Which solutions has more sodium (assuming all Na dissociates in all cases) .50 M NaCl or 5%(w/v) CH3COONa)
Saturday, February 12, 2011 at 10:30pm by Hewey

chemistry
The strength of an acid depends upon how completely it dissociates into hydrogen ions and negative ions, not how fully it dissolves.
Saturday, March 26, 2011 at 8:30am by drwls

chem
You need to do the following: 1. Convert 80L N2O4 at the conditions listed to moles. Use PV = nRT and solve for n. 2. Use stoichiometry to determine the moles N2 produced. Here is an example problem, worked, that shows how to do stoichiometry. http://www.jiskha.com/science/...
Thursday, September 8, 2011 at 10:29am by DrBob222

chemistry
when do you need to use the octet rule for lewis structures and when does it not apply i am confused for N2O4 i cant get the rules to work with the structure
Monday, April 20, 2009 at 9:47pm by lyne

chemistry
a 225.0g sample of an unknown, silver, pure metal was heated to 95.5 degrees Celsius and then put into 150.50g of water at 22.5 degree Celsius. the water was heated by the hot metal to a temp. of 31.4 degree Celsius. what is the specific heat of the metal and what is the metal?
Friday, March 15, 2013 at 2:56pm by brittany

chemistry
a 225.0 g sample of an unknown, silver, pure metal was heated to 95.5 degrees celsius then put into 150.50 g of water at 22.5 degrees celsius. the water was heated by the hot metal to a temperature of 31.4 degrees celsius. what is the specific heat? what is the metal?
Monday, March 18, 2013 at 2:59pm by brittany

chemistry
Most hydrates can be heated to drive off the water. The compound can be weighed, heated to drive off the water, and weighed again to determine the loss in mass from the water. This works if the compound doesn't decompose on heating.
Wednesday, March 31, 2010 at 5:58pm by DrBob222

Chemistry
There is no such compound as "sodium hydrogen". Perhaps you mean sodium hydroxide (NaOH). In water, it dissolves and dissociates into Na+ and OH-
Monday, August 25, 2008 at 9:14am by drwls

CHEM!
Well I almost understand this question but still got stuck, I will show you the question and my answer so I need someone to tell me if I did it correctly or not and how I should fix it. at 55degrees the K for the reaction: 2NO2(g)<=>N2O4 is 1.15 calc the concentration of...
Wednesday, May 2, 2007 at 5:49pm by Linda

chemistry
when heated in the presence of air, 80 grms. of copper completely react to form 100 grms. of copper oxide what is the mass of oxygen that has combined with the copper? how much copper must be heated to form 300 grms. of copper oxide?
Friday, November 13, 2009 at 12:24am by abby

Chemistry
NaHCO3 is also known as sodium bicarbonate. It dissociates into Na+ and HCO3- Some of the HCO3- will combine with H+ in the water to form H2O and CO2
Monday, August 25, 2008 at 9:14am by drwls

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