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July 25, 2014

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

Number of results: 3,452

Chemistry
Your Open Question Show me another Chemistry help needed... Confused? The following reaction is first order and the rate constant is 2.35 x 10^-4 s^-1 at 20 degress C. 2 N2O5 -----> 2 N2O4 + O2 A.) What is the rate of reaction if the [N2O5]=.25 M? B. What would the [N2O5...
November 20, 2012 by Krissy

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
April 20, 2009 by lyne

chemistry
calculate Ke for the following(equilibrium concertations given below substances H2(g) + Br(g)=2 Br+heat, N2O4(g) + heat= NO2(G)
June 1, 2010 by jessica

chemistry
IF ALL NITROGEN ATOMS FROM .1 MOLE nO2 AND .2 MOLE N2O4 ARE REMOVED THEN HOW2 MANY MOLES OF N2 CAN BE PREPARED FROM IT?
June 5, 2014 by tanvir

To John
If you have that question about the N2O4/NO2 equilibrium I can help if you re-post. I can't find it. I think you posted it Saturday but it may have been Sunday.
February 8, 2011 by DrBob222

CHem Help
what is the formula for laughing gas? is it N2O or N2O4? i think its N2O can anyone confirm this? It's N2O.
April 23, 2007 by naty girl

Chemistry
Which of the following nitrogen oxide molecules and related ions is/are diamagnetic and has/have more than two charge-minimized resonance structures? 1. NO 2. NO2 3. N2O4 4. NO2-
October 25, 2009 by Dave

Chem
I really appreciate the help you gave me earlier. I was wondering if you could please look over these questions for me to? The answers will always be either reactant, product or neither. 1)P4(s)+6 Cl2(g)<=>4 PCl3(l) Which side of the reaction will be favoured by an ...
January 29, 2012 by TINA

chemistry
Which of the following formulas -- NO, N2O, NO2, N2O, N2O4, AND N205 -- represent the empirical and molecular formulas of the same compound?
March 23, 2010 by Jeaninne

chemistry
8750 g of a compound which contains only carbon, hydrogen, and nitrogen were burned in oxygen to produce, 2.1930 g of N2O4 , and 2.2900 g of water. What is the empirical formula of the compound? (Hint: do carbon by difference)
September 21, 2011 by joan

Chemistry
N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?
November 29, 2012 by Odesa

chemistry
N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?
November 29, 2012 by sveta

chemistry
N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?
November 29, 2012 by NIK

Chemistry
Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
April 29, 2011 by Will

Chemistry
Consider this equilibrium: N2O4(g) + heat NO2(g). Initially, a 1.0 L container is filled with 2.0 mol of NO2. As the system approaches equilibrium, what happens to the rate of reaction of NO2 breaking down?
April 29, 2011 by Will

Chem
The brown color associated with photochemical smog is due to NO2(g). This is involved with the following equilibrium in the atmosphere: 2 NO2(g) <===> N2O4. Predict the signs of the enthalpy and entropy changes for this reaction. If the equation is at equilibrium should ...
March 30, 2008 by Ginger

Chemistry
I have a problem that I wasn't sure how to do, and I want to see if my reasoning behind getting the answer is correct. Question: If .0129 mol of N2O4 effuses through a pinhole in a certain amount of time, how much NO would effuse in that same amount of time under the same ...
January 1, 2007 by Dave

Chemistry
Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) <==> NH3(g) + HI(g) At 400C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400C. Please help! would it just ...
March 8, 2012 by Sarah

Chemistry
Using standard enthalpies information, calculate the standard enthalpy change for this reaction: a) (thermite reaction) 2Al(s) + Fe2O3(s) = Al2O3(s) + 2Fe(s) b) Mg(OH)2(s) = MgO(s) + H2O(I) c) N2O4(g) + 4H2(g) = N2(g) + 4H2O(g) d) SiCl4(I) + 2H2O(I) = SiO2(s) + 4HCI(g)
July 3, 2014 by Brett

Chemistry
Using standard enthalpies information, calculate the standard enthalpy change for this reaction. a)(thermite reaction) 2Al(s) + Fe2O3(s) = Al2O3(s) + 2Fe(s) b)Mg(OH)2(s) = MgO(s) + H2O(I) c)N2O4(g) + 4H2(g) = N2(g) + 4H2O(g) d)SiCl4(I) + 2H2O(I) = SiO2(s) + 4HCI(g)
July 3, 2014 by Dan

Chemistry
3 N2H4(g)+N2O4(g) 4 N2(g) + 4H2O(g) + 2 H2(g) ∆H= -1310 kJ (-312 kcal) How much energy is produced per mole of hydrazine burned? a. 13.6 kJ (3.25kcal) b. 40.9 kJ (9.75kcal) c. 437 kJ (104kcal) d. 1310 kJ (312 kcal)
August 13, 2012 by Patsy

chemistry
A 1.325 g sample of an unknown vapor occupies 386 mL at 114 celsius and 946 mmHg. The simplest formula of the compound is NO2. What is the molecular formula of the compound? (I have N2O4, is this correct and if not, why not? We never went over this type of question in class!
October 19, 2010 by lavonne

Chemistry
(1)Aluminum reacts with oxygen to produce aluminum oxide according to the following reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) Calculate the moles of Al2O3 produced when the reaction is performed with 31.06 g of each reactant. (2)Nitrogen dioxide reacts with water to produce ...
March 6, 2013 by WCU cats

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 ...
January 25, 2011 by rebecca niles

physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of copper heated at 80 degree...
July 31, 2012 by Anonymous

physics
a 200g aluminum container has 500g of water with an initial temperature of 22 degree celsius. The following heated pieces of metal are dropped into water at the same time as follows: 300g piece of aluminum heated at 100 degree celsius; a 50g piece of copper heated at 80 degree...
July 31, 2012 by Anonymous

chemistry
Use standard enthalpies of formation to calculate ΔHrxn for each reaction. (See the appendix. Enter your answer to the tenth place.) (a) 2 H2S(g) + 3 O2(g) 2 H2O(l) + 2 SO2(g) (b) N2O4(g) + 4 H2(g) N2(g) + 4 H2O(g) (c) SO2(g) + 1/2 O2(g) SO3(g) These are so easy, but no ...
November 17, 2012 by DeeDee

chemistry
Some spacecrafts use hydrazine (N2H4) as fuel and is burned according to the following reaction: N2H4(l)+N2O4(g)=>2 N2O(g)+2 H2O(g) Calculate the DHrxn for this reaction using the standard enthalpies of formation from Appendix IIB. Calculate your answer to 4 sig figs
March 4, 2013 by Brandi

maths &chemistry
Nitrogen tetraoxide is known to dissociate accoding to the equation;N2O4(g)_2NO2(g).A250mlsample of the gas mixture weighs 0.257bar.Calculate the partial pressure of each gas.(Hint:obtain the pressure it had before dissociation ,and then use the idea of equilibrium constant to...
November 30, 2010 by SAIDI

Chem
I have 4 questions, I got the answer for three of them and just want you to check and see if they are right and i do not know the answer to the fourth one. 1)4HCl(g)+O2(g)<=>2H2O(g)+2Cl2(g)+114.4 kJ Which side of the reaction will be favoured by an decrease in pressure...
January 29, 2012 by TINA

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 ...
November 4, 2010 by Rory

Chemistry
Half-life N2O5 dissolved in CCl4 decomposes to give N2O4 and O2. The reaction is first order with a half-life of 1234 seconds. How long will it take, in seconds, for the concentration of N2O5 to fall to 1.1% of its initial value?
December 1, 2012 by Paul

CHEM- KINETICS
Dinitrogen tetraoxide, N2O4, decomposes to nitrogen dioxide, NO2, in a first-order process. If k = 2.5 x 103 s-1 at -5 Cand k = 3.5 x 104 s-1 at 25 C, what is the activation energy for the decomposition? 0.73 kJ/mol 58 kJ/mol 140 kJ/mol 580 kJ/mol I am having massive ...
September 25, 2010 by lucylu

chemistry
When N2O5 (g) is heated it dissociates into N2O3 (g) and O2 (g) according to the following reaction: N2O5 (g) <--> N2O3 (g) + O2 (g) Kc=7.75 at a given temperature. The N2O3 (g) dissociates to give N2O (g) and O2 (g) according the following reaction: N2O3 (g) <--> ...
February 12, 2011 by Anonymous

Chemistry!
Consider the equilibrium system: N204 (g) = 2 NO2 (g) for which the Kp = 0.1134 at 25 C and deltaH rx is 58.03 kJ/mol. Assume that 1 mole of N2O4 and 2 moles of NO2 are introduced into a 5 L contains. What will be the equilibrium value of [N204]? Options are: A) 0.358 M B) 0....
February 12, 2012 by Vee

Chemistry
What is the value of Kp for the reaction: NO2(g)+CO(g)->NO(g)+CO2(g) Given the following information: 2NO2(g)->NO3(g)+NO(g) Kp=2.72x10^(-4) 2NO2(g)+2CO2(g)->2NO3(g)+2CO(g) Kp=5.73
November 27, 2011 by Tanya

chemistry
A 1.325 g sample of an unknown vapor occupies 386 mL at 114 celsius and 946 mmHg. The simplest formula of the compound is NO2. What is the molecular formula of the compound? (I have N2O4, is this correct and if not, why not? We never went over this type of question in class! ...
October 20, 2010 by lavonne

chemistry
N204 (l) Delta Hf (kJ/mol) = -20 E cell S (J/mol.K) = 209 N204(g) Delta Hf (kJ/mol) = 10 E cell S (j/mol.k) = 304.1 Given the following data, determine the temperature at which n2o4 (l) and n204 (g) can exist in equilibrium? a. 42 C b. 3 C c. -231 C d. 30 C e. -178 C
August 17, 2011 by Sara

chem
(CH3)N2H2(l) + 2N204(g) = 3N2(g) + 4H2O(l) + 2CO2(g). consider the reaction b2n 150g of liquid (CH3)N2H2 & 80L of N2O4 at 27 degree celcius & a pressure of 2 atm. The gases produced are collected at 27 degree celsius in an evacuated 250L. Calculate: a) Partial pressure of ...
September 8, 2011 by alia

Chemistry
Given the following equilibrium constants are given at 377C, 1/2 N2(g) + 1/2 O2(g) NO(g) K1 = 110−17 1/2 N2(g) + O2(g) NO2(g) K2 = 110−11 N2(g) + 3/2 O2(g) N2O3(g) K3 = 210−33 N2(g) + 2 O2(g) N2O4(g) K4 = 410−17 determine the values for the equilibrium...
February 13, 2013 by Margaret

Chemistry
A reaction is first order and it takes 324 minutes for the reaction to be 50.0% complete. How long will it take for the reaction to be 85.0% complete at the same temperature? 2. N2O5 decomposes to N2O4 and O2 and the reaction is first order in N2O5 with a specific rate ...
July 17, 2010 by Lin

chem
2NO(g) + O2(g) = 2NO2 If there are .02 moles of O2, .04 moles of NO, and .96 moles of 2NO2, calculate Kp if the total pressure is .2 atm.
June 1, 2008 by tina

chemistry
Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) Picture NH3(g) + HI(g) At 400C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400C.
March 8, 2012 by lauren

chemistry
Hello, a few questions: Thanks so much! 1. The heat capacities of titanium and water are 0.522 J g-1 K-1 and 4.184 J g-1 K-1, respectively. What is the final temperature of the titanium-water mixture if a 175.0-g sample of titanium, initially at 90.0oC, is added to 50.0 g of ...
March 1, 2014 by abby

Chemistry
1. what ion dissociates from an acid to give it its acid properties? 2. what ion dissociates from a base that gives bases their properties?
June 17, 2012 by hailey

chemistry
An equilibrium mixture contains N2O4, (P= 0.30 ) and NO2 (P= 1.1 ) at 350 K. The volume of the container is doubled at constant temperature. Calculate the equilibrium pressure of when the system reaches a new equilibrium. Calculate the equilibrium pressure of NO2 when the ...
May 20, 2010 by Anonymous

Chemistry
2NO(g) + O2(g) --> 2NO2(g) Derive the theoretical rate law and indicate whether or not this is a possible mechanism for the above reaction: (1) 2NO(g) <-->* N2O2(g) (fast) (2) N2O2(g) + O2(g) --> 2NO2(g) (slow) * indicates equilibrium arrows Thank you!
April 24, 2010 by Vanessa

chemistry
Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide: NH4I(s) ↔ NH3(g) + HI(g) At 400C, Kp = 0.215. If 150 g of ammonium iodide is placed into a 3.00-L vessel and heated to 400C, calculate the partial pressure of ammonia when equilibrium is reached ...
March 22, 2011 by Jason

Chemistry
Acetic acid dissociates/ionizes itself as follows: CH3COOH(aq) ⇔ H+(aq) + CH3COO-(aq) If you add sodium acetate, CH3COONa, to the solution: a) a precipitate will be formed b) more acetic acid will be ionized c) the concentration of hydrogen ions will decrease d) the ...
May 15, 2012 by Andrea

chemistry
When the conductivity is at a minimum, what must be true about the amount of Ba(OH)2 compared to H2SO4? The Ba(OH)2 dissociates as Ba+2 + 2 OH-. H2SO4 dissociates as 2 H+ + SO4-2. Why does it not conduct at this low point? Why does it conduct more before and after this minimum...
July 25, 2012 by Sara

Chemistry
The equilibrium constant for the reaction 2NO(g) + O2(g) <--> 2NO2(g) is Kp=1.48x10^4 at 184C. Calculate Kp for 2NO2(g) <--> 2NO(g) + O2(g). I know the equation is Kp=Kc(RT)x Delta n Kp is what we're solving for Kc= I can't seem to find. R=.0821 T=184+273 Delta n= ...
March 9, 2010 by Anonymous

Chem
From previous experiments, you have the following information. N2(g)+O2(g)<--->2NO(g) Kc=2.3*10^-19 2NO(g)+O2(g)<--->2NO2(g) Kc=3*10^6 using that information, how many moles of NO2(g) will be made if you started with 1 moles of N2(g) and 2 moles of O2 (g)? N2(g)+...
October 7, 2012 by Allyx32

Chemistry
Calculate the heat (in kJ) required to transform 58.60 g of dinitrogen tetraoxide from a solid at a temperature of -9.3 C to a gas at 47 C. Report your answer to one decimal place. Data: Molar mass of dinitrogen tetraoxide, N2O4 = 92.011 g/mol Melting point = -9.3 C Boiling...
December 5, 2011 by Matthew

Chemistry
Calculate the entropy change in the surroundings when 1.00 mol N2O4(g) is formed from 2.00 mol NO2(g) under standard conditions at 298 K. I get +192 J/K. The book says -192 J/K. Here is my work, where am I going wrong? Standard Enthalpy of NO2(g) = 33.18 kJ/mol * 2 mol = 66.36...
February 21, 2009 by chemstudent

CHEMISTRY
2NO(g) + O2(g) --> 2NO2(g) Derive the theoretical rate law and indicate whether or not this is a possible mechanism for the above reaction: (1) 2NO(g) <-->* N2O2(g) (fast) (2) N2O2(g) + O2(g) --> 2NO2(g) (slow) Extra Info: This reaction is third order overall. NO ...
April 25, 2010 by Vanessa

Chemistry
Consider each of the following reactions and decide whether the standard entropy change for the reaction will be, (a) Positive; or (b) Very close to Zero; or (c) Negative. Matching pairs N2 (g) + 3 H2 (g) = 2 NH3 (g) Mg (s) + CO2 (g) = MgO (s) + CO (g) C6H12O6 (s) + 6 O2 (g...
November 28, 2009 by Chem Lover

Chemistry
Are these correct? 1. KBr: Potassium Bromide 2. Cu2O: Copper (I) Oxide 3. HCl: Hydrochloric Acid 4. N2O4: Dinitrogen Tetroxide 5. H3P: Hydrophosphoric Acid 6. FeS: Iron (II) Sulfide 7. Ag2SO4: Silver Sulfate 8. HNO2: Nitrous Acid 9. Pb(CO3)2: Lead (IV) Carbonate 10. Ba(NO3)2: ...
January 12, 2011 by Anonymous

Chemistry
I've figured out the Ea but I'm not sure how to find the kcal/mol The gas reaction N2O5 → 2NO2 + 1/2O2 follows the Arrhenius equation k = Ae(-Ea/RT) where R = 8.314 J K-1 mol-1 and 1 calorie = 4.184J. At the temperature T=273K, k = 3.46 x 10-5 s-1, whereas at T = 298K, k...
March 5, 2013 by m

Chemistry
The following standard free energies are given for 25 degrees celcius. 1) N2(g) + 3H2(g)-> 2NH3(g) delta g = -33.0 kJ 2) 4NH3(g) + 5O2(g)-> 4NO(g) + 6H20() delta g = -1010.5 kJ 3) N2(g) + o2(g)-> 2NO(g) delta g = 173.1kJ 4) N2(g) + 2O2(g) -> 2NO2(g) delta g = 102.6...
July 6, 2011 by K

Chem
Some very effective rocket fuels are composed of lightweight liquids. The fuel composed of dimethylhydrazine (CH3)2N2H2 mixed with dinitrogen tetroxide was used to power the Lunar Lander in its missions to the moon. The two components react according to the following equation...
February 24, 2009 by Samantha

chemistry
Nitric acid can be prepared from ammonia by the following steps; 4nh3 + 5o2 = 6h2o + 4no 2no + O2 = 2no2 2no2 + h2o = hno3 + hno2 3hno2 = hno3 + 2no + h2o If all the steps take place consecutively, completely and without recycling, what mass of ammonia is needed to give 6.3g ...
March 20, 2013 by Agashre

Chemistry HELP!!!!
Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate their ...
October 31, 2010 by mia

Chemistry
Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate their ...
October 31, 2010 by Sarah

Chemistry
Nitric oxide (NO) reacts with molecular oxygen as follows: 2NO(g) + O2(g) 2NO2(g) Initially NO and O2 are separated as shown below. When the valve is opened, the reaction quickly goes to completion. Determine what gases remain at the end of the reaction and calculate their ...
October 31, 2010 by Sarah

chemistry
A mixture of 1.441 g of H2 and 70.24 g of Br2 is heated in a 2.00-L vessel at 700 K. These substances react as follows. H2(g) + Br2(g) arrow 2 HBr(g) At equilibrium the vessel is found to contain 0.627 g of H2. calculate their equilibrium concentrations and Kc
January 22, 2013 by Mariah

Chemistry
Why is sulfur dioxide (SO2) a better reducing agent than carbon dioxide (CO2) or nitrogen dioxide (NO2)? I really don't know how to answer your question. It's much like asking why the sky is blue, etc. You can look up the reduction potentials of SO2 vs CO2 and NO2 and explain ...
August 17, 2007 by Vic

Help with English sentence pattern
follows these rules: begins with a relative pronoun, follows any noun, restrictive noun follows common noun, non restrictive follows proper noun commas are not supposed to be used(i guess this is supposed to be sentence pattern 15??) here's the sentence: Mrs. Meger dislikes ...
September 25, 2012 by Deb

Chem104
for each mole of PCL5 which dissociates, how many moles of CL2 are produced
June 4, 2011 by bec

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 ...
July 31, 2007 by Vic

chemistry
why does a can of soda explode in a hot car? As the temperature rises, the gas (carbon dioxide that make the fizzle in soda pop)exerts more and more pressure until the container ruptures. Any gas heated tries to expand due to greater molecular motion.If it is contained, it ...
May 21, 2007 by Lillian

chemistry
what happens when solids, liquids, and gases are heated/cooled? Most expand if heated; contract if cooled. Solids, if heated high enough will melt and the liquid may occupy less volume than the solid. Likewise, liquids, if heated high enough, will boil and the volume of the ...
October 9, 2006 by carter

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
June 12, 2010 by Jerry

Chem
I am having problems with these two questions. 1.The value of the equilibrium constant (Kp) as represented by the first chemical equation is 1.58 x 102 at 727 C. Calculate the value of the equilibrium constant (Kp) for the second equation at the same temperature. Express ...
January 22, 2009 by Mark

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?
May 15, 2008 by leann

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

Chemistry
when 0.20 mole HF is dissolved in water to a volume of 1.00 L, 5.8% of the HF dissociates to form F- (aq). What is the equilibrium constant for the reaction ? HF(aq) + H2O (I) ----- F- (aq)+H3O+(aq)
April 4, 2012 by Elmali

Chemistry
when 0.20 mole HF is dissolved in water to a volume of 1.00 L, 5.8% of the HF dissociates to form F- (aq). What is the equilibrium constant for the reaction ? HF(aq) +H2O(l) ------ F- (aq) +H3O+ (aq)
April 5, 2012 by emily

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 ...
October 6, 2009 by Taylor

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 ...
July 13, 2007 by tanya

Chem 130
When calcium carbonate is heated strongly, carbon dioxide gas is released. CaCO3(s) CaO(s) + CO2(g) What volume of CO2(g), measured at STP, is produced if 14.1 g of CaCO3(s) is heated?
May 5, 2014 by jackie

Chemistry
What would be the molecular ratio of the following equation? 2NO2 = 2NO + O2
November 11, 2010 by Ann

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...
January 23, 2011 by Mogran

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

Science
2NO2. how many grams of NO2 will be produced with 5.00 moles of NO React? what would the working out of this be?
May 6, 2010 by Sammy

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

physics
The drawing shows a steel ball rolling along a flat surface at constant velocity from point A to point B. A magnet exerts an attractive force on the ball only for the short time that passes as the ball rolls past point B. Which one of the following trajectories does the ball ...
June 8, 2014 by Sam

physics
he drawing shows a steel ball rolling along a flat surface at constant velocity from point A to point B. A magnet exerts an attractive force on the ball only for the short time that passes as the ball rolls past point B. Which one of the following trajectories does the ball ...
June 8, 2014 by Sam

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 ...
June 15, 2006 by jackie

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 ...
May 13, 2010 by jake

Chemistry
At 319K the decomposition of dinitrogen tetroxide occurs with the following Kp: 2NO2(g)<>2NO(g)+O2(g) Kp=.700 What is the value of Kc for this reaction?
November 27, 2011 by Tina

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 ...
May 18, 2010 by jake

Chemistry
I have 3 I don't understand how to do. A 33.2 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 12.3 grams. What was the percent iron in the sample of ore? Answer in ...
September 21, 2012 by Brett

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 ...
June 27, 2011 by ishaan

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...
January 3, 2012 by mary

english
what follows a linking verb or a action verb. the simple tense of verbs. follows a preposition. sometimes called the simple predicate.
April 8, 2008 by tammy

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?
November 26, 2011 by Tammy

Fitness
describe the path that oxygen follows through the human body to reach muscle tissue and describe the path carbon dioxide follows from inside the cell to the outside envrionment
December 28, 2011 by Heather

science
describe the path that oxygen follows through the human body to reach muscle tissue and describe the path carbon dioxide follows from inside the cell to the outside envrionment
December 29, 2011 by melissa

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. ...
April 16, 2012 by anonymous

chemistry
What volume of 16M HNO3 is required to dissolve 0.50g of Cu metal in the following reaction? Cu(s) + 4HNO3(aq) ---> Cu(NO3)2 + 2H2O + 2NO2
February 3, 2011 by Alex

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