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Consider a titration of 43.8mL of .124 M solution of aqueous ammonia [Kb(NH3)=1.8*10-5] with a .124 M solution of hydrochloric acid. Compute
A: The pH of the aqueous ammonia solution before titrationB: The pH of the solution at half equivalence point.C: The pH of the solution at the equivalence pointD: The pH of the solution when 1.00mL of the HCl have been added after the equivalence point was reached.
A balloon is inflated with 0.2494g of helium to a pressure of 1.26 atm. If the desired volume of the balloon is 1.25L, what must the temperature be in degreeC
The boiling point of a substance is defined as the temperature at which liquid and vapor coexist in equilibrium. Use the heat of vaporization (30.91kJ/mol) and the entropy of vaporization
Once equilibrium is reached, the final temperature of the water-metal mixture is 44.6oC. What is the specific heat of the metal
Calculate the pH at the equivalence point for the titration of 0.250M methylamine (CH3NH2) with 0.250M HCl. Kb of methylamine is 5.0x10^-4,
Draw resonance structures to show in which position 4-methylacetanilide will undergo nitration.
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC
a peice of iron mass25.0 g at 398 k is placed in a styrofoam coffee cup containing 25.0 ml of water at 298 k. assuming
The reaction of methane and water is a way to prepare hydrogen according to CH4(g)+H2O=CO2(g)+H2(g) a) If 995 g of CH4 reacts with 2510 g of water, how many moles of reactants and products are there when the reaction is finished
Calculate the number of moles of NaHCO3 that reacted in each beaker. (The molar ratio between evolved CO2 and the bicarbonate is 1:1.
For a reaction a plot of ln k (rate constant) vs 1/T gave a line with y-intercept of 5.2. what is the value of the frequency factor for this reaction
A 6.50-g sample of copper metal at 25.0 C is heated by the addition of 84.0 J of energy. The final temperature of the copper is ____ C.The specific heat capacity of the copper is 0.38J/g-K.
Determine the delta G standard state at 298 K from the following standard state values at T= 298, Determine the delta G standard state at 1000K. assume delta H is independent of temperature
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