bme1

Most popular questions and responses by bme1
  1. chemistry

    The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO2(g) NaHCO3(s); ΔH°rxn < 0 Which, if any, of the following actions will decrease the concentration of CO2 gas present at equilibrium? A. lowering the

    asked on April 23, 2010
  2. chemistry(clarification)

    The following reaction is at equilibrium in a closed container. CuSO4.5H2O(s) CuSO4(s) + 5H2O(g) What actions, if any, will lead to an increase in the pressure of H2O present at equilibrium? the answer is nothing, but wouldnt decrease in volume will

    asked on April 23, 2010
  3. chemistry

    If the initial pressure of NH3(g) is 7.845 atm, calculate the % of NH3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 600.0 °C is 455000.00. The initial pressure of the reaction products is 0

    asked on April 12, 2010
  4. chemistry

    G naught doesnt tell you whether the reaction is spontaneous or not

    asked on June 5, 2010
  5. chemistry(check my answer)

    The overall rate of a chemical reaction is determined by a)the slowest step in the reaction mechanism. b)the fastest step in the reaction mechanism. c)ΔG for the overall reaction. d)the last step in the reaction mechanism. e)the first step in the reaction

    asked on May 16, 2010
  6. chemistry

    2H2O(l)=2H2(g) +O2(g) the stress is an increase in pressure. If there is an increase in pressure, the reaction would go to the side of fewer moles. Even though the left side has no moles of gas, is the result still shifting to the left

    asked on April 24, 2010
  7. chemistry(just need to clarify, no need to solve)

    When a sample of NO2(g) (5.641 mol) is placed in 360.0 L reaction vessel at 716.0 K and allowed to come to equilibrium the mixture contains 3.412 mol of NO(g). What is the equilibrium concentration (mol/L) of NO(g)? When a sample of PCl5(g) (1228 grams) is

    asked on April 12, 2010
  8. chemistry

    If the initial pressure of SO3(g) is 4.775 atm, calculate the % of SO3(g) left over after the reaction reaches equilibrium according to the balanced equation. The value of Kp at 1000 K is 24.40. The initial pressure of the reaction products is 0 atm.

    asked on April 7, 2010
  9. chemistry(check my work)

    The initial concentration for the compounds involved in the reaction shown were determined to be [CS2(g)] = 1.075 mol/L, [H2(g)] = 1.436 mol/L, [CH4(g)] = 0.6740 mol/L, [H2S(g)] = 0.3120 mol/L. Calculate the value of the equilibrium constant (Kc) at 1175 K

    asked on April 6, 2010
  10. chemistry

    i read in my chem book, it says that SiH4 is molecular compound but SiO2 is covalent network, but why not SiH4 since it has Si which can form network covalent as well?

    asked on March 13, 2010
  11. chemistry

    in NaCl, Na+ does not hydrolize but in Cr(NO3)3, Cr3+ hydrolizes to give H+, so when do we know which cation hydrolizes and which doesnt

    asked on May 9, 2010
  12. chemistry

    the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base

    asked on May 12, 2010
  13. chemistry(check my work)

    The initial pressure for the compounds involved in the reaction displayed were determined to be P(SO2(g)) = 0.5932 atm, P(O2(g)) = 0.4886 atm, P(SO3(g)) = 0.09287 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium

    asked on April 5, 2010
  14. chemistry

    2H2 + O2 yield 2H2O to calculate bond enthalpy, we have to take bond breaking minus bond making, how do we know which one is bond breaking and bond making

    asked on March 12, 2010
  15. chemistry

    does the half life formula t=ln2/k give sec as unit or min as unit

    asked on May 17, 2010
  16. chemistry

    2H2O(l)=2H2(g) +O2(g) if water is removed, the direction of equilibrium is unaffected since liquid water is not in the equil equation. What if large amount of water is removed, is the answer still the same

    asked on April 25, 2010
  17. eng

    Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. independent of the chemical identity of the solute. C. dependent on the molar mass of the solute. D. responsible for

    asked on April 7, 2010
  18. chemistry(just to double check)

    The initial pressure for the compounds involved in the reaction displayed were determined to be P(SO2(g)) = 0.5932 atm, P(O2(g)) = 0.4886 atm, P(SO3(g)) = 0.09287 atm. Calculate the value of the equilibrium constant (Kp) at 1000 K if the equilibrium

    asked on April 6, 2010
  19. chemistry

    the reaction between CV+ and -OH, which is lewis acid and lewis base? lewis acid: CV+ lewis base: -OH is this correct

    asked on May 12, 2010
  20. chemistry

    max electrostatic potential is where there are low electron density, does it mean that the larger the number of max potential indicates a strong acid strength

    asked on May 4, 2010
  21. chemistry

    What will happen in this reaction: NH3 + H2 = NH4 when x amount of NH4 is added, equilibrium is reached, then 2x is removed. to the product side because the amount taken out is greater than amount that is added? if amount added is x and amount removed is

    asked on April 23, 2010
  22. chemistry

    Calculate the molarity (mol/L) of Ba2+ when BaCrO4 is placed in a 0.0457 M K2CrO4 solution. The equation represents the solubility process. K(sp)=1.2x10^-10 BaCrO4 (s) Ba2+ (aq) + CrO42- (aq)

    asked on April 14, 2010
  23. chemistry(check my work)

    Calculate the value of the equilibrium constant (Kp) for the reaction displayed if the following equilibrium pressure data were measured at 25.00 °C: P(H2(g)) = 0.2282 atm, P(I2(g)) = 0.1646 atm, P(HI(g)) = 5.462 atm. H2(g)+I2(g) = 2HI(g) is it like this,

    asked on April 4, 2010
  24. chemistry

    Calculate the value of the equilibrium constant (Kp) for the reaction displayed if the following equilibrium pressure data were measured at 25.00 °C: P(H2(g)) = 0.2282 atm, P(I2(g)) = 0.1646 atm, P(HI(g)) = 5.462 atm. H2(g)+I2(g) = 2HI(g)

    asked on April 2, 2010
  25. chemistry

    2H2 + O2 yield 2H2O , so if i switch it around, 2H2O yield 2H2 + O2. Would it change which one is breaking bond, which one is making bond. So technically is the left side always breaking bond, right side is forming bond

    asked on March 13, 2010
  26. physics(check my answers)

    in a piston is locked in place and the cylinder is placed in a boiling water, the temperature, pressure, internal energy are all increase if a piston is being pushed inward, would it have the same answer as above

    asked on May 25, 2010
  27. physics

    if a piston is insulated and being pushed, is the temperature increased

    asked on May 25, 2010
  28. chemistry

    the reaction between CV+ and -OH, is CV+ lewis acid and OH lewis base

    asked on May 11, 2010
  29. chemistry

    for chemical equilibrium, what is the difference between percent ionization and percent dissociation

    asked on April 25, 2010
  30. chemistry

    What is the pH of the solution created by combining 2.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)?

    asked on April 17, 2010
  31. chemistry

    for haloacetic acids, HBr has higher stronger acid strength then HF but doesnt HBr has low dipole then

    asked on May 5, 2010
  32. chemistry

    so if my graph is absorbance vs time in minute, then my half life formula should give me time in minute right?

    asked on May 17, 2010
  33. chemistry

    does a low dipole indicate a strong acid

    asked on May 4, 2010
  34. chemistry

    can the concentrations of reactant and products affect the directions of equilibrium constant

    asked on April 23, 2010
  35. chemistry

    according to van deer walls equation, why does H2S have higher parameter a than CO2

    asked on March 14, 2010
  36. chemistry

    for thermodynamic, standard is 25 celsius and 10^5 Pa, so in this case does it mean that 1atm=10^5 Pa while for stp 1atm=101325 Pa

    asked on March 14, 2010
  1. chemistry

    BaCrO4 (s)= Ba2+ (aq) + CrO42- (aq)

    posted on April 14, 2010
  2. chemistry

    can you be clearer a bit, i gont get why you try to find S-32.066x1= 32.06/32.06=?? O-16.00x3= 48/32.06=?? why is 32.06/32.06, where did that number come from we don't need to use 4.775 and 24.4 to solve this?

    posted on April 7, 2010