1. T

    Rate equations

    Hi, I need some help with the rate equation in the attachment. I can see that [A] is first order but when I try to calculate [B] it comes up as a decimal. Any ideas? thanks
  2. C

    Balancing equations

    So I need to create a balanced chemical equation for Chlordiazepoxide. The molecular formula is C16H14ClN3O. How do I do this?
  3. P

    Thermochemical equations

    Hi, The combustion of 2.15g of methanol was found to yield 71.5kJ of heat. Calculate the deltaH value for this value, and write the thermochemical equation. This is what I have done so far: 2CH3OH(l) + 3O2 --> 2CO2(g) +4H2O(g) n(CH3OH) = m/M = 3.15/32.04 = 0.098 mol So 0.098 mol produces...
  4. D

    Complete and Net Ionic Equations

    This is for a lab: find the balanced molecular, complete ionic, and net ionic equations: 1. NaHCO3 (aq) + CuSO4 (aq) 2. NaHCO3 (aq) + Pb(NO3)2(aq) 1. Molecular: 2NaHCO3 (aq) + CuSO4 (aq) => Cu(HCO3)2 (s?) + Na2SO4 (aq) Complete Ionic: ? Net Ionic: ? Name the spectator ions, and reaction...
  5. C

    Equations? Please help!

    Please someone convert these equations into oxidation and reduction half equations..and please describe the reaction/what type it is.. 1) HNO3(aq) + NaOH (aq) → NaNO3(aq) + H2O (l) 2) H2SO4(aq) + Zn (s) → H2(g) + ZnSo4(aq) 3) CH3COOH (aq) + NaHCO3(aq) → CH3COONa (aq) + H2O (l) + CO2(g)...
  6. S

    net ionic equations, need help asap

    this is due in like 5 hours, need help with these. 1.Consider the reaction when aqueous solutions of magnesium sulfate and calcium iodide are combined. The net ionic equation for this reaction is: 2.Consider the reaction when aqueous solutions of calcium acetate and zinc sulfate are...
  7. F

    tips for balance equations

    (NH4)3 PO3 PO4 + Pb (NO3)4------>Pb3 (PO4)4 + NH4 NO3 Im helping my daughter (trying) To balance the above equation I call NH4(X) and PO4 (Y) and NO3 (Z) and I get 4, 3, ----> 1, and 12 respectively Am I doing this right? If I try with out substitution I get numbers everywhere...
  8. S

    Lost in my bio 113 (but actually chemistry) class?

    So I'm enrolled in a biotechnology summer institute at my community college this semester and the first day they tossed us right into something we weren't expecting - Chemistry. After all, the class we're enrolled in is Biology 113 and Bio 113 lab. So needless to say myself, and my entire class...
  9. L

    Balancing Redox Equations

    Hi I have a few redox equations that I have trouble solving. Here are the redox equations (below): 1. NO2---->NO3^-3 + NO 2(H2O + NO2 ---> NO3^-3 + NO + 2H^+1) 2H + NO2 ----> NO + H2O 2. H2O2 + Cr^3+ ----> Cr2O7^2- I've written the half-equations for both, but I still don't understand...
  10. Y

    Equations and observations and limiting reagent

    two more questions That i want to check if I have completed correctly. This one I belive my observations could be a bit better any suggestions? I just want to check if I haven't made any silly mistakes in this question
  11. T

    Forming equations

    How to form the balanced equation of propane burning excessively under oxygen. Or any other equation... I know the solution for this question is: C3H8 + 5 O2 >> 3 CO2 + 4 H2O but how is it derived? how to derive any other equation for example, magnesium and hydrochloric acid.
  12. P

    Balancing Redox Equations

    I am not learning chemistry and have no interest to. But I have been given the following as a puzzle for something unrelated, I wouldn't know where to begin. I need to know what the numbers in bold are, can someone help me?
  13. N

    Predicting Chemical Equations

    Al2O3(s) ------> Fe2O3(s) --------> Au2O3(s) ---------> Zn(s) + PbCl2(aq) -------------> H2SO4(aq) + NaOH(aq) ------------> Sr(NO3)2(aq) + Na2SO4(aq) ---------> KI(aq) + Cl2(g) ------> Mg(s) + HCl(aq) -----> NCl3(s) ----> Al(s) + CuSO4(aq) ------> 1. The type of chemical reaction (eg...
  14. P

    Help with balancing chemical equations

    Ba(OH)2 + H2SO4 → H2O + BaSO4 CH4+ O2→ CO2+ H2O NaCl+ H2SO4→ HCl+ NaHSO4 NH3+ 3O2→ N2+ H2O please balance at least 2 of those equations
  15. W

    I need help balancing equations!

    I have been struggling in my basic chemistry class and need any help I can get. I am having trouble balancing equations right now. Any suggestions?