# For the following, 2HBr (aq) + Ba(OH)2 (aq) ---> 2H2O (l) + BaBr2 (aq) write the net ionic equation including the phases

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1. ## Chemistry

For the following, 2HBr (aq) + Ba(OH)2 (aq) ---> 2H2O (l) + BaBr2 (aq) write the net ionic equation including the phases

2. ## 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

3. ## Chem

2HNO3(aq) + Sr(OH)2(aq) --> 2H2O(l) + Sr(NO3)2(aq)? Write the net ionic equation, including the phases. 2H^+(aq) + 2OH(aq) ---> 2H2O(l) Am I correct?

4. ## Chemistry

Which of the reactions are spontaneous (favorable)? a. 2H2O(g)⟶2H2(g)+O2(g) Δ𝐺=457 kJ/mol b. CH4(g)+2O2(g)⟶CO2(g)+2H2O(l) Δ𝐺=−820 kJ/mol c. 2Mg(s)+O2(g)⟶2MgO(s) Δ𝐺=−1137 kJ/mol d. C(s)+H2O(l)⟶CO(g)+H2(g) Δ𝐺=90.8 kJ/mol e.

5. ## chemistry

Complete and balance each of the following equations. K2SO4(aq)+BaBr2(aq)→ Would it be K2SO4(aq)+BaBr2(aq)→K2Br2 +SO4Ba? Express your answer as a chemical equation. Enter no reaction if no precipitate is formed. (How can we know if a solid is formed in

6. ## Chemistry

Which of the following processes is endothermic? a) H2O (g) --> H2O (l) b) 3O2 (g) + 2CH3OH(g) --> 2CO2(g) + 2H2O(g) c) H2O (s) --> H2O (l) d) O2(g) + 2H2(g) --> 2H2O(g) I a guessing b, since energy has to go into the reaction for water to go from a solid

7. ## Chemistry

In a particular redox reaction, BrO– is oxidized to BrO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Two half reactions: 1.) Cu^2+ --> Cu^+ 2.) BrO^- --> BrO3^- Balanced: 1.) Cu^2+ +e^- --> Cu^+

8. ## Chemistry

From the following data at 25°C, H2(g) + Cl2(g) → 2HCl(g) ΔH0 = −185 kJ 2H2(g) + O2(g) → 2H2O(g) ΔH0 = −483.7 kJ Calculate ΔH0 at 25°C for the reaction below. 4HCl(g) + O2(g) → 2Cl2(g) + 2H2O(g)

9. ## Chem

At 25°C the following heats of reaction are known: 2C2H2 + 5O2 ---> 4CO2 + 2H2O; ΔH = -2600 kJ C + O2 ---> CO2 ; ΔH = -394 kJ 2H2 + O2 ---> 2H2O; ΔH = -572 kJ At the same temperature, calculate ΔH for the following reaction: 2C + H2 ---> C2H2; ΔH =

10. ## Chemistry - Thermodynamics

Which one of the following reactions would you expect to have highest ΔS°? Answer A. C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(g) B. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) D. C2H6(g) + 7/2O2(g) → 2CO2(g) + 3H2O(g)

calculate enthalpy of H for the reaction N2H4(l) + 2H2O(l) -> N2(g) + 4H2)(l) Given the reactions N2H4(l) + O2(g) -> N2(g) + 2H2O(l) Enthalpy of H = -6.22.2 kJ H2(g) + (1/2)O2(g) -> H2O(l) enthalpy of H = -285.8 kJ/mol H2(g) + O2(g) -> H2O2(l) enthalpy of

12. ## Chemistry

Which of the following reactions will result in a reduced total pressure? a. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) c. 2HI(g) → H2(g) + I2(g) b. 2N2O(g) → 2N2(g) + O2(g) d. 2H2(g) + O2(g) → 2H2O()

13. ## chemistry

1) All of the following are oxidation-reduction reactions except (a) 2Al(s) + Fe2O3(s) ---> A12O3(s) + 2Fe(s) (b) (NH4)2Cr2O7(s) ---> Cr2O3(s) + N2(g) + H2O(1) (c) Cu(s) + 2H2SO4(aq) ---> CuSO4(aq) + SO2(g) + 2H2O(1) (d) Hg(NO3)2 + 4KI ---> K2HgI4(aq) + 2

14. ## Science

Which of the following reactions does not involve oxidation-reduction? a). C3H8 + 5O2 → 4H2O + 3CO2 b). Mg + 2HI → MgI2 + H2 c). Ba + 2H2O → Ba(OH)2 + H2 d). MnO2 + 4HI → I2 + 2H2O + MnI2 e). NaOH + HI → H2O + NaI

15. ## chemistry

"Write equations for the half-reactions that occur at the anode and cathode for the electrolysis of the following aqueous solution: CuBr2(aq)" Possible oxidation reactions: 1. 2Br- -> Br2 + 2e- = -1.09 2. 2H2O -> O2 + 4H+ + 4e- = -1.23 Possible reduction

16. ## Chemistry

What is the balanced net ionic equation for the following reaction: 2 NH4Cl + Ba(OH)2 = 2H2O + BaCl2 + 2 NH3 i got 2NH4^+ +2OH- = 2H2O + 2NH3 but it keeps telling me i'm wrong

17. ## science

The decomposition of water into hydrogen gas H2 and oxygen gas O2 can be modeled by the balanced chemical equation A) H2 + O2 → H2O B) H2O → H2 + O2 C) 2H2 + O2 → 2H2O D) 2H2O → 2H2 + O2

18. ## Chemistry

Given H2(g) + (1/2)O2(g) ---> H2O(l), dH = -286 kJ/mol, determine the standard enthalpy change for the reaction 2h2O(l) ---> 2H2(g) + O2(g) 2H2O(l) ---> 2H2(g) + O2(g) H2(g) + (1/2) O29g) ---> H2O (l) : dH = -286 kJ/mols 2H2O(l) ---> 2H2(g) + 2O2(g) :

19. ## Chemistry

Write the net ionic equation for the reaction between sulfuric acid and potassium hydroxide. I got 2H^+ + 2OH^-1 ==> 2H2O. Is this correct?? Thanks.

20. ## Chemistry

Which contains the greatest number of bromide ions? a) 100 mL of 1.0 M BaBr2 b) 50 mL of 2.0 M NaBr c) 20 mL of 2.5 M FeBr3 d) All contain the same number of chloride ions. How would I go about this question?

21. ## chemistry

For the following chemical reaction write the net ionic equation, including the phases. 2HBr (aq) +Ba(OH)2(aq) --> 2H2O(l) +BaBr2 (aq)

22. ## Chemistry (redox reaction)

Which reaction is a redox reaction? 1. HCI+H2O=H3O^+ +CI^- 2. H2SO4+2KOH=K2SO4+2H2O 3. CH4+2O2=CO2+2H2O 4. Fe^2+ +2OH^- =Fe(OH)2 I chose number 3, is this correct?

23. ## Chem

The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. 2HBr(g) H2(g) + Br2(g) Kc=0.322 H2(g) + Br2(g) 2HBr(g) Kc= ?

24. ## chemistry

write the net ionic equation for the following : 2CuCl(aq)-> CuCl2(aq)+ Cu(s) 4NaCl(aq)+2H2SO4(aq)+MnO2(s)-> 2Na2SO4(aq)+2H2O(l)+Cl2(g) 3KOH(aq)+Fe(NO3)3(aq)->Fe(OH)3(s)+ 3KNO3(aq)

25. ## Chemistry

Consider a mixture of the two solids BaCl2.2H2O (FM 244.26) and KCl (FM 74.551). When the mixture is heated to 160C for 1 hour, the water of crystallization is drive off: BaCl2.2H2O --> BaCl2(s) + 2H2O(g) A sample originally weighing 1.7839g weighed

26. ## chem

The value for ΔH° for the reaction below is -72 kJ. How many kJ of heat are released when 1.0 mol of HBr is formed in this reaction? H2(g) + Br2(l) = 2HBr(g)

27. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

28. ## Chemistry

molecular equation for BaBr2 (aq) + PB(NO3)2 (aq) -> Ba(No3) + Pb(Br2) is that right or is it Ba(No3)2

29. ## chem

I need help balancing this redox equation: H2O2 + Ni+2 --> H2O + Ni+3 in basic solution. Here's what I have so far: Ni+2 --> Ni+3 + 1e- H2O2 --> H2O I can't seem to make the second half-reaction balance. If you follow the rules for balancing basic redox

30. ## Chemistry

in the reaction: Cl2 + 2HBr ----> 2HCl + Br2 identify the reduced specie

31. ## Chemistry

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the net ionic equation.

32. ## Chemistry

what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)? by making use of the following information: 1. 2CO2(g)+2H2O(I) = CH3COOH(I)+2O2(g), K1=5.40x10^-16. 2. 2H2(g)+O2(g) = 2H2O(I), K2=1.06x10^10. 3. CH3COOH(I) -

33. ## Chemistry

The following soluble salts are strong electrolytes. For each, write a balanced equation for their dissociation in water. NaBr BaBr2 Li3PO4

34. ## Chemistry

calculate the theoretical yield (in grams) of the solid product, assuming that you use 1.0 g FeC2O4×2H2O and that oxygen is the excess reactant. FeC2O4×2H2O (s) + O2(g) ---> FeO(s) + H2O(g) + CO2(g) Its balanced equation is 2FeC2O4×2H2O (s) + O2(g)---->

35. ## Chemistry (Equilibrium)

At high temperature, 0.500 mol of HBR was placed in a 1.00L container where it decomposed to give the equilibrium: 2HBr H2 + Br2 At equilibrium, the [Br2] is 0.0855 mol/L. What is the value of the equilibrium constant? My work: ..2HBr H2 + Br2 I

36. ## Chemistry

Write the equilibrium constant expression for the reaction: 2NO +2H2 =N2+2H2O Kc=?

37. ## Chemistry #27

Given that: H2 (g) + F2 (g) ---> 2HF (g) H(rxn)= -546.6 kJ 2H2 (g) + O2 (g) ---> 2H2O (l) H (rxn)= -571.6 kJ calculate the value for H(run) for... 2F2(g) + 2H2O (l) ---> 4HF (g) + O2 (g) _____kJ?

38. ## Chemistry

For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2->4CO+2H2O+2HBr Thank you!

39. ## Chemistry

For the balanced equation shown below, if 40.1 grams of C2H3O2Br were reacted with 8.01 grams of O2, how many grams of H2O would be produced? 2C2H3O2Br+O2->4CO+2H2O+2HBr Thank you!

40. ## science

Which of these compounds would you expect to have the highest melting point: C2H6,CL2,AsCL3, BaBr2? Explain your answer

41. ## Chemistry! I need help quick! Thank you very much!

2h2O2 + 2H2O ---> 2H2O + O2 If 50cmcube , 2.0 mole/dmcube of hydrogen peroxide is decomposed and volume of oxygen gas collected. How much hydrogen peroxide is decomposed?

42. ## chemistry

When a reaction mixture with a total volume of 1750 mL that is 0.0263 M aqueous K+ was stoichiometrically produced as per the balanced equation, what volume (mL) of 0.0326 M aqueous K3PO4 was required? 3 BaBr2(aq) + 2 K3PO4(aq) → Ba3(PO4)2(s) + 6 KBr(aq)

43. ## Chemistry

If the reaction H2 + Br2 2HBr has a rate law that can be described by k[H2][Br2]1/2, which series of reactions is a possible mechanism for the reaction? a. Br2 2Br (fast) Br + H2 HBr + H (slow) HBr + H + Br â†’ 2HBr (fast) b. Br2 2Br (slow) Br + H2

44. ## Chemistry: Check my answers?

Write “yes” or “no” below if the chemical equation is balanced or not. 1. 2H2 + O2 ---> 2H2O 2. S8 + 12O2 ---> 8SO3 3. HgO ---> Hg + O2 4. Zn + HCl ---> ZnCl2 + H2 5. 2Na + 2H2O ---> 2NaOH + H2 6. 2Al + 3FeO ---> Al2O3 + 3Fe 7. 4Si2H3 + 11O2 --->

45. ## chemistry - combustion

Write the chemical equation for the complete combustion of each fuel. Then find the enthalpy of combustion, ΔHcomb, of each fuel. Express your answers in kJ/mol and kJ/g. Assume that water vapour, rather than liquid water, is formed in both reactions. CH4

46. ## Chemistry

A 0.960mol quantity of Br2 is added to a 1.00 L reaction vessel that contains 1.23mol of H2 gas at 1000 K. What are the partial pressures of H2, Br2, and HBr at equilibrium? At 1000 K, Kp=2.1×106 and ΔH∘ = -101.7 kJ for the reaction

47. ## chemistry

Which one of the following is not a redox reaction? PbO2(s) + Pb(s) + 2H2SO4(aq) 2PbSO4(s) + 2H2O(l) Ba(NO3)2(aq) + Na2CrO4(aq) BaCrO4(s) + 2NaNO3(aq) Zn(s) + 2MnO2(s) ZnO(s) + Mn2O3(s) 2H2O(g) 2H2(g) + O2(g)

48. ## Chemistry

CaSO4.2H2O ==> CaSO4 + 2H2O moles CaSO4.2H2O = 15.00 g x (1 mole CaSO4.2H2O/172.172) = 0.08712 moles. moles CaSO4 = same. grams CaSO4 = moles CaSO4 x molar mass CaSO4 = ?? Wait,.. how do I know the moles CaSO4? do I do .08712* CaSO4's gfm?

49. ## Chemistry - enthalpy of combustion(help!!!)

i need help with the below question, i have tried answering it, but do not know where to go after the equations, please start me off on how to find the enthalpy of combustion of at least one.... Consider methane, CH4, and hydrogen, H2, as possible fuel

50. ## Chemistry

Write the equilibrium constant expression, K, for each of the following reactions. Where appropriate, designate the K as Ksp. 2H2(g) + O2(g)2H2O(g) 2Hg(l) + Cl2(g) Hg2Cl2(s)

51. ## science

Here are some examples of molecules: Cl2, CO2, SO2, and CF4. Each of these is related in that they're all bonded covalently. Which of these is a covalently-bonded molecule also? A. He atoms B. K2S C. BaBr2 D. P2O4

53. ## University of Belize

5. A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant. a. Calculate the mass, in grams, of Na2SO4 in the mixture. b. Calculate

54. ## AP Chemistry

write the keq expression for the following reaction and determine the value of the Keq at 25degree celcius: MnO2(s)+4H+(aq)Mn2+(aq)+2H2O(l)+Cl2(g)

55. ## Chemistry Help

How many milliliters of 0.534 M Ba(OH)2 solution are needed to completely neutralize 34.5 mL of 0.220 M HBr solution? The reaction is Ba(OH)2(aq) + 2HBr(aq) → BaBr2(aq) + 2H2O(l) I did 0.0345 * 0.220 = 0.00759 Moles of HCl =2*0.00759= 0.01518

56. ## chemisry

2NaHCO3 --- Na2CO3 + H2O + CO2 2Fe + 6 HCl -- 2 FeCl3 + 3H2 2HBr + Ca(OH)2 -- CaBr2 + 2H2O N2 + 3H -- 2NH3 2H2O -- 2H2O + O is this a redox ? what is oxidized, reduced

57. ## physical science 2nd semester

what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)

58. ## CHEMISTRY

2HBr+Mg(OH)2 -> MgBr2+2H2O how many mL of a 0.2 M HBr solution is required to react with 40 mL of a 0.40 M Mg(OH)2 solution

59. ## CHEM 1411

What volume (in mL) OF 0.0215M HBr solution is be required to titrate 0.235L of a 0.0150M Ca(OH)2 solution? Ca(OH)2+2HBr= CaBr2+2H2O

60. ## Please double check...GK or Dr.Bobb22

Hi, i actually posted this up before..please double check the answers if i got them right have to hand in on Wednesday: The Chemicals are: Baking Soda- NaHC03 Calcium Chloride- CaCl2 Bromothymol Blue - (acid base indicator)

61. ## Chemistry

Write “yes” or “no” below if the chemical equation is balanced or not. 1. 2H2 + O2 ---> 2H2O 2. S8 + 12O2 ---> 8SO3 3. HgO ---> Hg + O2 4. Zn + HCl ---> ZnCl2 + H2 5. 2Na + 2H2O ---> 2NaOH + H2 6. 2Al + 3FeO ---> Al2O3 + 3Fe 7. 4Si2H3 + 11O2 --->

62. ## Chemistry

Complete each ionic equation Cu+2 + SO4-2 + 4H2O ----> Ca+2 +2NO3-1 + 4H2O ----> 3K+1 +PO4-3 + 6H2O ----> Na+1 + Br-1 + 2H2O ----> 2Na+1 + S-2 + 2H2O -----> 2NH4+1 + CO3-3 + H2O ----> 2Na+1 + Cr-2 + 2H2O -----> Mg+2 + 2Br-1 + 4H2O -----> Na+1 + Cl-1 + 2H2O

63. ## chemistry

write the balanced chemical equation for the reaction that occurs when water is added to anhydrous BaCl2. would it be BaCl2+2H2o --> BaCl2+2H2O

Determine whether the following are redox reactions. If a redox rxn., identify the oxidized reactant and the reduced reactant. a)N2 + 3H2-->2NH3 : YES, Oxidized=H, Reduced: N b)2H2O2-->2H2O + O2 : YES, Oxidized=H, Reduced: O c)2HBr + Ca(OH)2 -->CaBr2 +

65. ## Chemistry

what is the name of the ions that are formed when the following compounds dissolve in water. (a) BaBr2 (b) (NH4)2CrO4 (c)HBr

66. ## 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

67. ## Chem

What is the correct net ionic equation for the following set of reactants? Ba(OH)2(aq)+H2SO4(aq)---->2H2O(l)+BaSO4 I keep getting the answer as 2OH^- + 2H^+ ----> 2H2O(l) but it counts it wrong.

68. ## chemistry

How many g of H2 is formed from 2.4 g H20 according to the following reaction. 2H2O--->2H2O+O2 I believe the answer is .27g However, I can't understand how to work the problem completely out or one like it, if someone could please explain the formula it

69. ## someone correct my work please? fun, fun chemistry

Okay. I'm very, very confused. The initial question is: predict the products of the electrolysis of a 1 mol/L solution sodium chloride. This is my work: The four different possible equations are: 2H2o + 2e- -------> H2 + 2OH- (V= -0.83) O2 + 4H+ + 4e-

70. ## chemistry

what is free energy for h2+br2=2hbr at 25 degrees celcius

71. ## chemistry

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the new ionic equation.

72. ## chemistry

A 0.972g sample of a CaCl2*2H2O/K2C2O4*H2O solid salt mixture is dissolved in ~ 150ml of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of 0.375 g. The limiting reactant in

73. ## chemistry

how do i write this reaction in cell notation I2(s) + 2MnO4-(aq) + 4H+(aq) → 2IO3-(aq) + 2Mn2+(aq) + 2H2O(l)

74. ## cHEMISTRY

i don't know how to write chemical formulas is it like nomenclature because i need to balance equations (which i know how if the equation is given to me the symbols type but not in words), i need to write skeletal equations but i don't know if they are

75. ## chemistry

Calculate Ke for the following (equilibrium concentrations given below substances) H2(g)+Br2(g) yields 2HBr(g) + heat[.513] [.62] [.346] Thank you!

76. ## Urgent Chemistry question!

How do i combine 2 half ionic equations into an overall equation?? 4OHˉ → 2H2O + O2 + 4e 2H+ + 2e → H2 *The "H+" is the hydrogen ion The correct overall equation is 2H2O → 2H2 + O2 How do i get that???

77. ## chemistry

How do you find the molarity(M) of NaOH in this reaction: 2NaOH(aq) + H2C2O4-H2O > Na2C2O4(aq) + 2H2O The only given information is 0.2079g of H2C2O4-2H2O

78. ## chemistry

Cathode = Cu2(s) + 2e- ¨ Cu(s) Anode = 2H2O(l) ¨ O2(g) + 4H(g) + 4e- Net = Cu2(s) + 2H2O(l) ¨ Cu(s) + O2(g) + 4H(g) the minimum voltage that must be supplied to electrolyze aqueous copper(II) sulfate

79. ## chemistry

write the balanced chemical equation for the reaction that occurs when BaCl2.2H2O is heated.

80. ## Chemistry

Write a molecular form of the equation for the reation CaCl2*2H2O/K2C2O4*H2O

81. ## Chemistry

What is the theoretical yield of calcium carbonate if 2.97 grams of calcium chloride dihydrate reacts with excess sodium carbonate according to the balanced chemical reaction shown below? CaCl2•2H20(aq)+Na2CO3(aq)->CaCO3(aq)+2NaCL(aq)+2H20(I) Please use

82. ## Chemistry

hrdrogen peroxide, H2O2, can be placed on open wounds as in an antiseptic. When you do this, bubbling occurs because 2H2O-------> 2H2O + O2 However, H2O2 only decomposes slowly in the bottle. Why does the wound accelerate its decompostion

83. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

84. ## chemistry

What is the ion in the resulting solution? 100.0 mL of 0.015 M K2CO3 and 100.0 mL of 0.0075 M BaBr2? 25 mL of 0.57 M Ni(NO3)2 and 100.0 mL of 0.150 M NaOH

85. ## Chem LAB

Write the net chemical equation for below equations H2O2 + 2I- + 2H+ -----> 2H2O + I2 2 S2O32- + I2 -----> 2I- + S4O62- How do you solve for this problem

86. ## Chemistry

H2 +Br2 =2HBr so suggest twoo reasons why all the collisions between hydrogen and bromine gas molecules do bot result in reaction?

87. ## CHEMISTRY

(Re-post) Write the equilibrium constant expression, K, for each of the following reactions. Where appropriate, designate the K as Ksp. 2H2(g) + O2(g)2H2O(g) 2Hg(l) + Cl2(g) Hg2Cl2(s)

88. ## chemistry

2.00g of carbonate reacts with excess hydrobromic acid. Use this balanced equation to fond the theoretical yield. Na2Co3 + 2HBr = CO2 + H2O + 2NaBr

89. ## chemistry

By using the bond enthalpies and bond energies in thermochemical equations to calculate the reaction enthalpy of; H + Br=2HBr

90. ## scuence

if known h2 + br2 produce delta h 2hbr totaled 11.2 -72 then to decipher hbr gas into H2 and br2 as much heat is required?

91. ## Chemistry

Please check this over and see of they are right...if they are not can you please tell the the right answer and explain how you got it. I think I am getting myself confused. Thank you. Write the neutralization reaction for each of the following. Balance

92. ## chemistry

write the equilibrum constant expression for Kp of the following: a.) O2-->--------< 2PbO(s) + 2SO2(g)

93. ## Chemistry 30

predict the products of the reaction between acidified H2O2 with potassium permanganate solution H2O2 (l)  KMnO4 (aq) + 2H2O (l) + 6H+ (aq) + 6e- H2O2 (l) + 2H2O (l)  KMnO4 (aq) + + 6H+ (aq) + 6e- is this right? I'm confused. May I please get help?

94. ## chemistry

Use the bond enthalpies and bond energies in the data book in themochemical equations to calculate the reaction enthalpy of: H2(g) +Br2(g) -> 2HBr(g)

95. ## Chemistry

Is this equation balanced? 2HCl(aq) + Ca(OH)2(aq) -------> 2H2O + CaCl2 yes. It helps in these to write water as HOH, in this you would have had 2 HOH

96. ## Chem 2

need to figure out how to calculate. the value of DeltaH for the reaction below is -72kj_____kj of heat are released when 1.0 mole of HBr is formed in this reaction. H2(g)*Br2(g)> 2HBr(g) I know the answer is 36 but need help

97. ## Chemistry

A .972g sample of a Cacl2 2H2O/K2C2O4 H2O solid salt mixture is dissolved in 150 ml of deionized water, previously adjusted to a pH that is basic . The precipitate after having been filtered and air dried has a mass of .375g. what is the percent by mass of

98. ## Chemistry

How should I write the balanced chemical equation to represent the oxidation of Cu+ ion by air? [Cu(NH3)3]^+1 + 2H2O + ??? --> [Cu(NH3)3(H2O)2]^+2