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When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the temperature of the solution went up to 49.8C a) calculate qh20 b) find delta H for the reaction as it occurred in the calorimeter c) find delta H for the solution of 1g NaOH in water d) find delta H for the solution of 1 mole NaOH in water e) Given the following heats of formation, delta Hf, in kJ per mole, as obtained from a table of delta Hf data, calculate delta H for the reaction NaOH(s)---->Na+(aq)+OH-(aq). Compare your answer with the result you obtained for part d. NaOH(s), -425.6; Na+(aq), -240.1; OH-, -230.0
The volume of each glass was 250mL. How much heat, in kJ, did the body have to supply to raise the temperature of the water to body temperature (37 C)?
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
Which is the best acid to use in the preparation of a buffer with pH = 9.3?
The half life for the first order decay of 99Mo is 66.02 hours. How long will it take for a sample of 99Mo to decay
Another Reaction, A -> Products, is a first order reaction. An experiment was performed at 25C which determined the rate constant is 0.015min^-1. THe activation energy of this reaction is +34.8kJ/mol. Calculate the temperature, in C, of the reacti..
During a titration, a student used 31.92 ml of a .1000 M NaOH (aq) to neutralize 30.0 ml of a . 2488 M oxalic acid solution. a. Write the balanced equation for the neutralization reaction ( you need the formula of oxalic acid)!
What is the electron configuration of the atom in the third row of the periodic table that has the smallest ionization energy?
What are the molality and mole fraction of solute in a 36.3 percent by mass aqueous solution of formic acid (CH3OH)?
A 0.10-mole quantity of CuSO4 is added to a liter of 1.0 M NH3 solution. What is the concentration of Cu2+ at equilibrium. [The formation constant for Cu(NH3)42+ is Kf = 5.0 x 1013.]
Metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas. If 17.1 g of Mg are heated with 9 g of H2O, what is the limiting reactant.
Calculate the partial pressure of carbon dioxide in the associated soil atmosphere.
Need to dissolve CaCl2 in water to make a mixture that is 28.0% calcium chloride by mass. If the total mass of the mixture is 884.7 g,
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