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For the reaction A --> B, the activation energy is Ea = 125 kJ/mol and the heat of reaction, H = 50 kJ/mol. What is Ea for the reverse reaction in kJ/mol?
Either bulb will be used for 2,000 hours per year at an electricity cost of $0.14/kwh (kilowatt-hour). If the interest rate is 6%, which bulb is more cost effective over 8,000 hours of use based upon a comparision of Net Present Values?
Calculate w (in kJ) when 390 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 426 K.
14.0 moles of gas are in a 6.00 L tank at 22.6 C. Calculate the difference in pressure between methane and an ideal gas under these conditions.
Determine the final pH of a solution that is prepared by mixing 25 mL of 0.15 M sodium hydroxide( NaOH )with 20. mL of 0.20 M HA,( a weak acid with Ka = 2.3 x 10-6)?
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
Explain why a buffer made of equal concentrations of CH3COOH and CH3COO- does not change in pH when a small amount of NaOH (a strong base) is added to the solution. Does the NaOH dissociate into ions when it is added to the solution?
Explain the hazards associated with 1.0 moles of Ch3COOH solution, 0.10 moles of BaCL2 sloution, and 0.10 moles Na2C2O4 solution?
At 20 degrees celsius the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. what is the vapor pressure at 20 degrees celsius of a solution prepared by mixin 26.0 g. of methanol and 85 g. of ethanol?
What is the van't Hoff factor for HX in water? b) What is the molality of X1- ions in the solution?
What is the molarity of a solution made by mixing 213.6 ml of 1.5 M NaCl with 328 ml of 4.3 M NaCl.
Calculate the empirical formula and the molar formula.
If the acid dissociation constant, Ksuba, for an acid HA is 8 x 10^-4 at 25 degree C, what percent of the acid is dissociated in a 0.50 M solution of HA at 25 degree C?
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