Wednesday

September 17, 2014

September 17, 2014

Number of results: 63,202

**AP Chemistry**

What is meant by minimum and maximum energy problems. Are there different equations to find them. What does this conceptually mean? * This is dealing with quantum chemistry such as plancks equation, and debroglie equation.
*November 18, 2010 by qwerty123*

**Chemistry**

I am having a bit of difficulty getting the net equation and the net ionic equation and the net ionic equation. I think I have the balance equation right. Thanks in advance for any help. For the acid base neutralization reaction of carbonic acid, H2CO3(aq), and lithium ...
*March 4, 2010 by Amanda*

**Chemistry**

For the equation give the formula equation, ionic equation, and the net ionic equation after predicting the products and balancing. Using the solubility rules to indicate solid or aqueous each formula. AgNO3 + NaCl
*October 30, 2013 by Cindy*

**chemistry**

write the balanced formula equation and the net ionic equation for the reaction of sodium hydroxide with hydrochloric acid. Formula equation.............. net equation.............
*October 30, 2011 by denis*

**chemistry(balance equation)**

hi!i am a f4 student in hk.i have know the basic concept of balance equation.but some too complex equation i cant balance.is there any general short cut for balancing any simple or complex chemical equation?
*January 19, 2012 by kate*

**Chemistry**

Write a balanced chemical equation (molecular equation). Write a total ionic equation. write a net ionic equation. (NH4)2 SO4(aq)+Na2CO3(aq) -->
*March 15, 2011 by Jake*

**chemistry**

write the balanced molecular equation, the complete ionic equation and the net ionic equation. copper(2) sulfate and 10% sodium hydroxide
*April 12, 2011 by Anonymous07*

**Chemistry**

Write the molecular equation, the complete ionic equation, and the net ionic equation for the reaction of barium hydroxide with sodium nitrate.
*November 23, 2011 by Jane*

**College Chemistry**

I balanced the equation: HBr(aq) +NH3(aq)->NH4Br I need to find the ionic equation and the net ionic equation
*October 3, 2010 by KELLY*

**Chemistry**

What is the overall equation, the complete ionic equation, and the net ionic equation for the reaction that occurs when aqueous solutions of cobalt (II) bromide and sodium hydroxide are mixed?
*March 21, 2011 by Shay*

**Chemistry**

For the following equation, write a thermochemical equation that includes an energy term within the equation: The formation of 1 mol of copper(II)chloride from its elements releases 220.1kJ of energy.
*September 13, 2014 by Han*

**Chemistry**

what is the balanced formula equation, complete ionic equation, and net ionic equation FeSO4(aq) + KCl(aq)
*October 26, 2007 by Anonymous*

**Chemistry Equation(again)**

What I wrote is the balanced ionic equation. The ++ are written as exponents and could be written as we usually do it as Cu^+2 + Zn ==> Zn^+2 + Cu. For the molecular equation, it is Cu(NO3)2 + Zn ==> Zn(NO3)2 + Cu So the ionic equation for adding copper(II)nitrate to ...
*January 7, 2007 by DrBob222*

**Chemistry**

What do I do when writing the net ionic equation for Magnesium nitrate reacted with sodium chloride? I've wrote out the molecular equation and the total ionic equation. Everything cancels out....under my total ionic equation do i just write no reaction? |thanks!
*January 19, 2011 by Jack*

**Chemistry Equation(again!)**

Posted by chrissy on Saturday, January 6, 2007 at 1:23pm. In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. For Further Reading Chemistry Equation - DrBob222, Saturday, January 6, ...
*January 6, 2007 by chrissy-needs Chem help ASAP*

**Chemistry 2 **

When we mix 25.0 mL, 2.0 M BaCl2 with 25.0 mL, 3.0 M Na2SO4 what is the balanced equation? What is the ionic equation? what is the net ionic equation?
*March 3, 2014 by Ivan *

**chemistry**

During combustion, methine yeilds carbon dioxide and water. the unbalanced equation for this reaction is : CH4(g)+O2(g)>CO2(g)+H2O(i) what will the mole ratios for the balanced equation be?(what coefficients are needed in order to balanced the equation?)
*December 14, 2011 by Meteknesh*

**chemistry**

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ˝ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ˝ O2 (g) == NO2 (g) + ˝ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223 eliminated down to b or d but going ...
*March 12, 2012 by bob*

**chemistry**

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ˝ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ˝ O2 (g) == NO2 (g) + ˝ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223 eliminated down to b or d but going ...
*March 12, 2012 by bob*

**chemistry**

Consider the following double displacement reactions. For each reaction, complete and balance the equation and give the net ionic equation. NH4Cl(aq)+Ca(NO3)2(aq) -> NH4(NO3)2+CaCl the second half of the equation is what I had done but I think its not right...
*November 11, 2010 by Riley*

**Chemistry**

For a reaction between sodium phosphate and strontium nitrate write out the following: a) The balanced molecular equation b) The ionic equation c) The net ionic equation a) I think I have this one: 2 Na3PO4 (aq) + 3 Sr(NO3)2 (aq) --> 6 NaNO3 (aq) + Sr(PO4)2 (s) b) Should I ...
*May 14, 2008 by Donna*

**chemistry**

The Rydberg equation (1/lambda=R/ni^2R/nf^2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? by GC 1/lambda = R/ni^2R/nf^2 y = mx + b (standard form) of a linear equation) x = (y-b)/m Let, y = 1/lambda m = -R x = ...
*January 15, 2010 by bubble*

**Science (Chemistry)**

. Complete all the following for the reaction (NH4)2S + Cd(NO3)2 --> CdS(s) + NH4NO3 1. Balance this equation 2. Write the ionic equation 3. Write the net ionic equation
*March 14, 2014 by Anonymous*

**Chemistry**

When the following solutions are mixed together, FeSO4 (aq) + Csl (aq): What precipitate if any will form, Write the balanced equation, write the complete ionic equation and wriye the net ionic equation?
*April 13, 2012 by Ann*

**chemistry**

Phosphoric acid and barium hydroxide solutions mix to form water and solid barium phosphate. Write the word equation, skeletal equation, and the balanced equation for this word problem.
*March 3, 2010 by Joe*

**chemistry**

We are determining the molarity of HCl by titration of HCl. What would be the complete equation and the net ionic equation? THanks What are you titrating it with? Won't that make a difference in the equation we write? It's titration of HCl with NaOH. molecular equation: HCl + ...
*September 17, 2006 by bria*

**Chemistry**

What is the chemical equation for: CuI + NH4OH ---> ??? This equation should oxidise Cu+ to Cu2+.
*March 13, 2010 by Alan*

**Chemistry**

Find the product for the equation and then write a balanced equation. Cl2 + FeBr3 -> ?
*January 15, 2012 by Zoe *

**Chemistry**

What is the complete balanced equation for this partial equation? Mg(s) + HCl(aq) → ?
*January 25, 2012 by Shea*

**Chemistry**

Can someone balance this equation using the half-reaction equation method? OF2 + I^- ----> F^- + I3^-
*February 21, 2008 by Anonymous*

**chemistry**

The Rydberg equation (1/lambda=R/ni^2R/nf^2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)?
*January 10, 2010 by Katherine*

**chemistry**

the net ionic equation for the following molecular equation KNO2(aq) + HCl(aq) KCl(aq) + HNO2(aq)
*October 10, 2012 by Jasmine*

**chemistry**

Balance the following equation by partial equation method:- P4 + HNO3= H3PO4 + NO2 + H2O
*May 27, 2014 by simran*

**Chemistry**

hi I'm having a serious problem with balancing chemical equations , can someone explain to me how we can do them also if i had a word equation hhow can i convert it into a symbolic equation and balance it e.g can someone show me how we do this equation: KOH3+HNO3 ---}( what's ...
*December 24, 2007 by Simon Lodge*

**Chemistry**

hi I'm having a serious problem with balancing chemical equations , can someone explain to me how we can do them also if i had a word equation hhow can i convert it into a symbolic equation and balance it e.g can someone show me how we do this equation: KOH3+HNO3 ---}( what's ...
*December 24, 2007 by Simon Lodge*

**chemistry**

Ok, I'm sure this is a stupid question, but when I try to break down the following equation to its net ionic equation, all of the elements cancel out. I'm obviously doing something wrong... Can anyone help with the net ionic equation for: Fe(NO3)3 (aq) + 3KSCN (aq) ---> Fe(...
*March 29, 2009 by lholmq*

**chemistry**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)?
*January 18, 2010 by sara*

**Chemistry**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)?
*April 12, 2010 by Christian *

**Chemistry**

Balance the equation and then write the net ionic equation a. (NH4)2 CO3(aq) + Cu(NO3)2(aq) to CuCO3(s) + NH4NO3(aq)
*August 20, 2012 by PJcotieboi*

**chemistry**

Write the net ionic equation for the following molecular equation. CoI2(aq) + K2CO3(aq) CoCO3(s) + 2KI(aq)
*March 3, 2014 by kammy*

**Chemistry**

Complete and balance the following equation. Then write it as a net ionic equation. K3PO4(aq) + MgCl2(aq) Umm...help
*May 8, 2014 by Angela*

**Chemistry**

WRITE THE BALANCED CHEMICAL EQUATION,WRITE THE OVERALL IONIC EQUATION,IDENTIFY THE SPECTOR IONS AND POSSIBLE PRECIPITATES,WRITE THE NET IONIC EQUATION FOR mercury(II)chloride(aq)+potassium sulfide(aq)
*February 9, 2011 by Jasmine*

**Chemistry**

Why would potassium no longer appear in the equation of a net ionic equation with KIO3 being the oxidizing agent?
*April 20, 2010 by Teel*

**chemistry**

How do I balance this equation. Give the complete or "molecular" equation for the predicted partner exchange reaction. FeCl3 and NH3
*September 12, 2011 by Anonymous*

**chemistry**

write the net ionic equation for the following molecular equation. 2Crl(aq)+3NaCO3(aq) ---> Cr2(CO3)3(s) + 6NaI(aq)
*March 1, 2014 by Kay*

**Cosmology**

The equation describing the geometry and mass-energy distribution of a homogeneous and isotropic universe is known as: - The Einstein Equation - The Friedmann Equation - The Robertson-Walker Equation - The Hubble Equation
*January 8, 2013 by qwerty*

**Chemistry**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? A. (mb)^1/2 B. (mb)^1/2 C. (mb)^1/2 D. mb E. mb^2 F. None of these are correct.
*April 14, 2008 by Chris*

**Chemistry**

Is this equation correct? KI + HCl +KMnO4 --> KCl +MnCl +H2O + I2 If so what would be the color of the solution? PS. I am aware the equation is not balanced. =]
*October 10, 2009 by DL*

**chemistry**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? A. mb^2 B. (m/b)^(1/2) C. m/b D. (m/b)^(1/2) E. (mb)(1/2) F. None of these are correct.
*January 11, 2010 by tea*

**Chemistry**

Write the general rate equation for each of the components in the balanced equation for the combustion of butane 2C4H10(g)+ 13O2(g)-> 8CO2(g) + 10H2O(l)
*November 27, 2011 by Kristi*

**Chemistry PLEASE HELP!!**

energy from glucose is obtained from this equation when it is oxidized in the body C6H12O6 + 6O2 --> 6CO2 + 6H2O What is the catalyst in this equation?
*March 22, 2012 by Annie*

**chemistry**

How do you calculate deltaHf using the # of moles from a balanced equation? How do you connect the Law of Conservation of Energy to a Thermochemical Equation? Thanks so much!
*April 29, 2013 by K*

**Chemistry**

? CaSO_4 + AlCl_3 ---> CaCl_2 + Al_2(SO_4)_3 How do I balance this equation so that there are the same number of sulfate ions on both sides of the equation?
*September 19, 2009 by Cory*

**chemistry**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? A. mb B. (mb)12 C. (mb)12 D. (mb)12 E. mb2 F. None of these are correct.
*April 12, 2010 by Christian *

**chemistry**

The Rydberg equation, with n1=1, predicts an ultraviolet series of spectral lines of atomic hydrogen. Which of the following wavelengths is not predicted by the equation: 1/ = (1.097 x 10(7) m - 1) x (1/n1(2)-1/n2(2)
*November 3, 2010 by lavonne*

**chemistry**

The reaction equation below shows the formation of aluminum oxide. Which set of coefficients balances the equation? Al + O2 ?Al2O3 A. 1,1,1 B. 2,3,5 C. 2,4,5 D. 4,3,2 . can someone help me pleaseee!!
*May 28, 2012 by lalt*

**Chemistry**

A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for his reaction
*March 4, 2013 by Amee*

**chemistry**

Does this equation need to be balanced? AlCO3 => AlO+CO2 Also, how would this equation be balanced? NiCl+O2 => Ni2O3+Cl2O5 Neither equation you have is an equation so they can't be balanced. Do you mean aluminum carbonate. That would have the formula Al2(CO3)2. Aluminum ...
*December 14, 2006 by Carter*

**chemistry**

Write the balanced formula equation, complete ionic equation, and net ionic equation. If no precipitate forms, write "No reaction" a) Hg2(NO3)2 (aq) + CuSO4 (aq) b) Ni(NO3)2 (aq) + CaCl2 (aq) c) K2CO3 (aq) + MgI2 (aq) d) Na2CrO4 (aq) + AlBr3 Please explain! Thank you
*December 11, 2011 by Gabby*

**MATH**

I NEED TO SOLVE FOR Y AND X im getting rele confused on this. ok here is the prob. x+y=5 x-2y=-4 equation 1 x+y=5 equation 2 x-2y=-4 Multiply equation 1 by -1. Add equation 1 to equation 2. The x term cancels. Solve for y. THEN, put the value of y into either equation and ...
*December 17, 2006 by Tony*

**Chemistry**

Write the molecular equation and the net ionic equation for each of the following aqueous reactions. Ca(NO3)2 + K2CO3 FeSO4 + NaCl NiCl2 + NaBr
*September 30, 2008 by Brittany*

**Chemistry**

I misread the question i posted earlier. The equation is Pb(OH)2 (s) + NaOH (aq)---> ? I know that the complex ion formed is Pb(OH)4^2- , but would that be written in a balanced net-ionic equation?
*April 4, 2010 by Anonymous*

**Chemistry Lab**

The Rydberg equation (1=Rni 2Rnf 2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? A. mb B. mb2 C. (mb)12 D. (mb)12 E. (mb)12 F. None of these are correct. Thank you :)
*January 17, 2011 by Shawn Tabrizi *

**Chemistry, HELP!!**

Write out a balanced equation for reaction of solid zinc with hydrochloric acid (HCl(aq)). Indicate all states of matter in your equation.
*September 9, 2014 by Zuri*

**Chemistry pls help**

I have a chemistry question Please advise how do I prepare 1L of 75% H2SO4 from concentrated H2SO4 (98% of density 1.84g/ml)? Do you have an equation which i can use? Someone gave me the following equation but I do not understand it. Vx1.84x0.98={(1000-V)+ 1.84V}0.75 where V= ...
*December 3, 2008 by tricia*

**Chemistry**

Use the equation to determine what volume of nitrous oxide can be produced from the decomposition of o.55 moles of ammonium nitrate useing the equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
*April 14, 2011 by Jane*

**physics**

Which equation would you use when you were describing a flowing viscous fluid? Select one: a. The Bernouilli Equation b. The Poiseuille Equation c. The equation of continuity d. And of the Equation of continuity or the Bernouilli Equation or the Poiseuille Equation.
*June 22, 2014 by lisa*

**Chemistry**

Given the unbalanced equation shown: _Al+_CuSo4 -> _Al2(SO4)3+_Cu When the equation is balanced using the smallest whole-number coefficients, what is the coefficient of Al?
*April 13, 2009 by .*

**Chemistry**

I'm having a lot of trouble balancing this chemical equation: Fe(NO3)3(aq) + KSCN(aq) → KNO3(aq) + FeSCN2+(aq) Also, I'm not even sure if the equation is right... Help is appreciated, thanks
*May 17, 2010 by Yikes*

**Chemistry**

What is the net ionic equation of reaction of MgCl2 with NaOH? I got the equation and then balanced it and then omitted the spectator ions and ended up with: Mg(OH)2(aq)--->Mg(OH) (s) I wanted to confirm to see if that was correct, thanks.
*September 26, 2012 by M*

**Chemistry**

For each reaction, complete and balance the equation and give the net ionic equation. a) KOH(aq)+ZnCl2(aq)-> KCl2+ZnOH The second half of the equation is how i had done on the exam but he said its not balanced. How do I balance this? How would it look. I keep trying but not...
*November 10, 2010 by Jess*

**Chemistry**

Consider the reaction in aqueous solution: 6 HCl + 2 KMnO4 + 5 H2O2 ---> 5 O2 + 2 MnCl2 + 2 KCl + 8 H2O 1.) Write the total ionic equation. 2.) Write the net ionic equation. 3.) For each species (molecule or ion) in the net ionic equation, assign oxidation numbers to H, O, ...
*February 29, 2012 by Amy*

**chemistry**

How do you compare and contrast a chemical equation and an ionic equation? Is a chemical equation any equation while an ionic equation deals with the gain/loss of electrons? A chemical equation usually consists of what I call a molecular equation whereas an ionic equation (or ...
*December 15, 2006 by Carter*

**Chemistry**

Can someone check my answers for me thank you. I have the equation balanced below. 2H2O + K2SO4 --> H2SO4 + 2KOH Ionic equation for the reaction between sulfuric acid and potassium hydroxide. 2H+ + SO4^2- + 2K+ + 2OH- --> 2K+ + SO4^2- + 2H2O Net equation would be: 2H+ + ...
*January 13, 2008 by Susie*

**chemistry**

I was trying to do a balanced reaction equation to show cyanide being oxidized by hypochlorite ion to cynate. I wasn't sure if there needed to be oxygen in the equation too. CN + NaOCl = OCN + NaCl
*April 6, 2010 by Mel*

**chemistry**

Balance the following equation: K2CrO4+Na2SO3+HCl>>>>>>Na2SO4+CrCl3+H2O Enter the coefficients for eachcompound, separated by commas, in the order in which they appear inthe equation (e.g., 1,2,3,4,5,6,7
*April 4, 2011 by roshan*

**chemistry**

Balance the following equation: K2CrO4+Na2SO3+HCl--->KCl + Na2SO4+CrCl3+H2O Enter the coefficients for each compound, separated by commas, in the order in which they appear in the equation (e.g., 1,2,3,4,5,6,7).
*November 2, 2012 by Angie*

**chemistry**

For the electrolysis of molten potassium bromide: (a) write the equation for the reaction at cathode. (b) write the equation for the reaction at anode. (c) write the equation for the overall reaction.
*September 10, 2014 by Shane*

**chemistry**

Reacting Mg with acid solution to form Mg salt and Hydrogen gas. What are the: 1.general reaction type 2. Chemical equation include phase 3. complete ionic equation include phase 4. chemical equation for the reaction between magnesium with water
*October 3, 2012 by shay*

**chemistry 12**

For the acid-base neutralization reaction of Carbonic acid, H2CO3(aq) and lithium hydroxide, LiOH(aq), write the blanced: a)complete equation b) Ionic equation c) Net ionic equation. ----------------------- i got a) H2CO3(aq) + 2LiOH(aq) = 2H2O(l) +Li2CO3(aq) i know my answers...
*October 4, 2011 by Robyn*

**Chemistry**

How much heat is given off when 24.0 g of methane is burned in air? The equation for the reaction is: CH4 + 2O2 => CO2 + 2H2O + 890 kJ What equation or formula should I use to solve this? Thanks!
*March 29, 2010 by Lily*

**Desperate to understand ionic/net equa.-Chemistry**

When the following solutions are mixed together, FeSO4 (aq) + Csl (aq): What precipitate if any will form, Write the balanced equation, write the complete ionic equation and write the net ionic equation?
*April 13, 2012 by ASA*

**Chemistry**

What is the net ionic equation when H2SO4 is neutralized by NaOH in aqueous solution? Write the molecular equation. H2SO4 + 2NaOH ==> Na2SO4 + 2H2O Convert to ions. 2H^+ + SO4^= + 2Na^+ + 2 OH^- ==> 2Na^+ + SO4^= + 2H2O Now cancel those ions that appear on both sides of ...
*February 17, 2007 by Bob*

**Chemistry**

Balance the equation. Cu + HNO3 --> Cu(NO3)2 + NO2 + H2O I'm having a little trouble getting this equation to balance. Thank you in advance! :)
*April 16, 2012 by Lindsey*

**Chemistry**

You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2
*February 12, 2008 by Killa*

**Chemistry**

You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO ? Hg + O2
*February 12, 2008 by Killa*

**Chemistry**

You are to determine the mass of O2 that can be produced from 25 grams of HgO. Don't forget to balance the equation first! this is the equation: HgO -> Hg + O2
*February 12, 2008 by Killa*

**chemistry**

The combustion of 38.5g of C2H6 with excess oxygen. Find the equation, balance equation and find the mass of each product
*December 16, 2010 by hbluefrost*

**Chemistry**

What would the equation be for the reaction between potassium permanganate and cyclohexene. I know it's a oxidation reaction but not sure of the equation.
*February 28, 2011 by Lizzy*

**chemistry**

i need a molecular equation, ionic and net ionic equation for this : K_3 PO_4 + 〖Ca(NO〗_3 )_2
*March 23, 2012 by Anonymous*

**Honors Chemistry**

How do I write a complete ionic equation and net ionic equation for: 2HCl(aq)+Ca(OH)2(aq) ¨ 2H2O(l)+CaCl2(aq) ?
*December 2, 2012 by Tripp*

**Chemistry**

Complete ionic equation and net ionic equation for 2 K3PO4 + 3 Fe(NO3)2 --> 6 KNO3 + Fe3(PO4)2
*March 26, 2014 by Ryan*

**chemistry**

The equation for the best-fit function through the points on the graph below is y = 5x-1. We can tell from this equation and the graph that volume and pressure are __________.
*December 28, 2009 by jasmine*

**chemistry**

In the following equation, which species is the oxidizing agent? KCLO3 --> KCL + KCLO4 In the same are, How do you know that Cu is the reducing agent in this equation: AgNO3 + Cu ---> Cu(NO3)2 + Ag
*December 9, 2010 by audrey*

**chemistry**

write the equation of the neutralization of sulfuric acid (H2SO4) with potassium hydroxide (KOH) and write the net ionic equation for the reaction
*October 25, 2011 by Doss*

**Chemistry**

1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
*April 10, 2013 by Yaneth*

**Chemistry**

1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
*April 10, 2013 by Yaneth*

**chemistry**

If heat of reaction, Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) , is - 544 kJ/mol, heat of reaction, CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) , is -192 kJ/mol. and heat of formation of water is -286, what is heat of CaO? Ca(s) etc is equation 1. CaO + 2H^+ etc is equation 2. H2 + 1/2 O2 ==>...
*February 10, 2007 by nicholas*

**Chemistry-check my work**

The equilibrium constant kc for the equation CS2 + 4H2 <--> CH4 +2H2S at 900 C is 27.8. what is the value of kc for the following equation? 1/2CS2 + 2H2 <---> 1/2CH4 +H2S sqr root of 278=5.27?
*April 14, 2010 by Anna*

**Chemistry**

How would you go about solving an equation like this when all they give you is a equilibrium equation?: Given the standard free energies of formation in Appendix B in the textbook, what is the value of E ^\circ for the cell reaction?
*June 21, 2012 by Claire*

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