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Juan performed a calorimetry experiment to determine ?H for the following reaction:
KOH (s) -> K+ (aq) + OH- (aq)
His calorimeter contained 64.0 g of water at an initial temperature of 20.7°C. When he added 1.65 g of KOH (s) to the calorimeter, the temperature rose to 26.9°C. What value of ?H can Juan obtain from his data?
Gold (III) oxide, Au2O3, undergoes a thermal decomposition reaction to form gold metal and oxygen gas. Write a balanced molecular
Identify the reaction as precipitation, acid-base, oxidation-reduction and/or gas forming. What is the concentration of the unknown solution
A solution is prepared by dissolving 13.3 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 11.50 mL sample of this stock solution
At its boiling point of -34.0 degree Celsius, 6.33 kJ of heat is required to vaporize 22.0 g of chlorine (Cl2). What is the molar enthalpy of vaporization of chlorine.
22.3 g of a substance x dissolves in enough water to make 0.507 l of a 0.779 m solution. calculate the molar mass of x
During a quirky promotion by a discount sporting goods store, golf balls were given away free when purchasing Ping-Pong balls in bulk. An equal mass of golf balls was given away based on the mass of ping
What is the lewis structure and molecular shape around the carbons in CCl2CH2 as predicted by the VSEPR theory?
In a particular photoelectron spectrum using 21.21 eV photons, electrons were ejected with kinetic energies of 10.01 eV, 8.23 eV, and 5.22 eV. Sketch the molecular orbital energy level diagram for the species, showing the ionization energies of th..
Write balanced, net ionic equations when the following compounds are mixed. Indicated mixtures where no reaction is expected with the notation no rxn.
To prepare 5.0 L of a 3.50 M solution of Potassium Hydroxide (KOH), how many grams of Potassium Hydroxide must be used?
The minerals chalcocite (Cu2S) and malachite (Cu2CO3(OH)2) are two primary sources of copper. What is the oxidation state of copper in each of these minerals?
Calculate the pH during the titration of 21.7 mL of 0.451 M KOH with 0.212 M HBr after 18.3 mL of the acid have been added.
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