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What is the ppm of a solution prepared by mixing 25.0 g ethylene glycol (molar mass = 62.1 g/mol; C2H6O2) with 125 g of water(molar mass = 18.012 g/mol; H2O)?
Balanced thermochemical equation and enthalpy diagram, The decomposition of zinc carbonate, ZnCO3(s), into zinc oxide, ZnO(s), and CO2(g) at a constant pressure requires the addition of 71.5kJ of heat per mole of ZnCO3.
calculate the freezing and boiling points of each of the following solutions. 0.40 mol ethylene glycol and 0.17mol KBr in 122 g H2O.
In a fictitious lab experiment a class studied two acid base reactions and recorded the temperature change. class averages were reported 1) 30 ml of 3 molar hcl with 30 ml of 1.5 naoh change in temp was 12.2 +or - 1.3
We have a 0.0100 M solution of ammonium acetate (Nh4C2H3O2), an ionic compound that dissociates completely in water. The ammonium cation is a weak acid (pKa=9.24) and the acetate anion is the conjugate base of acetic acid, another weak acid (pKa=..
At 25 degrees Celsius the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10^-3 min^-1 If the starting concentrate of pesticide is 0.0314M what concentration will remain after one hour at 25degreesC
The presence of the carbon-carbon double bond in eugenol can be tested using the bromine water test. write a balance equation for the reaction involved in this test?
Assuming the earth is a perfect sphere with a radius of 6371 km and an atmosphere that extends from the surface to an altitude of 20 km determine the number of metric tons of the elements/compounds+
What is the pH at the equivalence point for the titration of 0.20 M HCl with 0.20 M NH3?
Consider an electrochemical cell constructed from the following half cells, linked by a KCl salt bridge. The nickel electrode loses mass and the nickel electrode is the cathode.
Ammonia rapidly reacts with Hydrogen Chloride, making ammonium chloride. Calculate the number of grams of excess reactant when 3.80g of NH3 reacts with 4.20g of HCl
And 25.43 ml of Na2S2O3 x 5H2O reacts with the KIO3. What's the concentration of the thiosulfate solution
Solutions A and B are separated by a semipermeable membrane that is permeable to K+, but not Cl-. Initially, Solution A is 0.5 L of 100 mM KCl, and Solution B is 0.5 L of 1 mM KCl.
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