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Use the following information to find ?H°f of gaseous HCl: N2(g) + 3H2(g) ? 2NH3(g) ?H°rxn = - 91.8 kJ N2(g) + 4H2(g) + Cl2(g) ? 2NH4Cl(s) ?H°rxn = - 628.8 kJ NH3(g) + HCl(g) ? NH4Cl(s) ?H°rxn = - 176.2 kJ
The concentration of a biomolecule inside a rod shaped prokayorate call is 0.0025M Calculate the number molecules inside the cell, which is 2.4 um long and 1.4 um in diameter.
Copper metal is purified by electrolysis. How much copper metal could be produced from copper(II) oxide by applying a current of 10.0 amps at the appropriate negative potential for 12.0 hours
The equilibrium constant, K, for the reaction shown below has a value 1.8 x 105. In this reaction which is the strongest acid and which is the strongest base
if the activation energy is 55kJ/mol, determine the rate constant at 26 celcius. dinitrogen tetroxide decompses to nitrogen dioxide with a rate constant
The following reaction is first order with respect to NO and first order with respect to O2, and the rate constant is 5.0 x 104 M-1s-1: 2NO(g) + O2(g) --> N2O4(g) a) Write the rate law for this reaction
Compute delta Hf for CaC2 : CaC2 + 2H2O-->Ca(OH)2 +C2H2 From the given enthalpy of reaction data as water(H2O) =(2*-285.83),calcium hydroxide Ca(OH)2=(-986.2) , AcetyleneC2H2 =(226.77)?
how does a water softener work chemically? What's better to drink tap water or bottle springwater and why?
100 moles of water at 70 degrees celsius is brought into thermal contact with 100 moles of a monatomic gas at 20 degrees celsius, and the two substances exchange heat until they reach the same temperature. Assuming that no heat is lost to the surr..
A voltic cell with an aqueous electrolyte is based on the reaction between Cd2+ (qu) and Mg(s), producing Cd (s) and Mg2+. Write a balanced cell reaction.
calculate the molecular mass of the nonionic solutes. 8.02 grams of solute in 8.61 grams of water lower the freezing point to -0.430 degress celcius.
Write a balanced titration reaction. (b) Write two different half-reactions for the indicator electrode.
The calibration points for the Martian temperature scale are the usual melting point of ice and boiling point of water, which are assigned the values 0 °M and 80 °M. the normal body temperature of humans is 98.6 °F. What is this temperature in °M?
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