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When 29.0 mL of 0.605 M H2SO4 is added to 29.0 mL of 1.21 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate ?H of this reaction. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water.)
H per mole of H2SO4 reacted:____________ kJ/mol
H per mole of KOH reacted: ____________ kJ/mol
3NaHCO3(aq) + H3C6H5O7(aq) → 3CO2(g) + 3H2O(l) + Na3C6H5O7(aq) How many moles of Na3C6H5O7 can be produced if one tablet containing 0.0119 mol of NaHCO3 is dissolved?
what is the chemical calculation to figure out the following: calculate the new molarity if the following dilution is made (assuming the volumes are additive): 25.0 mL of water is added to 10.0 mL of 0.251 M CaCl2 solution.
Write a Lewis structure for each of the following molecules.
Draw two molecules that are diastereomers and calculate the energy of each. Then draw two molecules that are enantiomers and calculate the energy of each.
Which components of an acrylamide gel effects qualities of the final product, and which components affect the speed of polymerization?
Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the sample? What madd of potassium would you need to have the same number of potassium atoms as there are sodium atoms in the sample of sodium.
What is the entropy change if two mole of liquid water is heated from 20 C to 100 C under constant pressure? Cp=75.5 J/mol*K over this temperature interval
Determine what amount of heat is required to increase the temperature of sixty grams of ethylene glycol from 15.1 degree Celsius to 40.3 degree Celsius?
Ionization energy is the energy needed to eject an electron from an atom or ion. Calculate the ionization energy, IE
Draw a Lewis structure for each molecule and determine its molecular geometry. What kind of intermolecular forces are present in each substance?
What mass of solid sodium formate (of MW 68.01) must be added to 110 mL of 0.55 mol/L formic acid (HCOOH) to make a bu?er solution having a pH of 3.84? Ka = 0.00018 for HCOOH
how much energy is required to turn 500 g of ice at -15.0 celsius to liquid water at 55.0 celsius? specific heat (ice) = 2.10 J/g * C. Specific heat (water)= 4.18 J/g*C
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