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Calculate the masses of the solid you must measure out to prepare 100mL EACH OF 0.025 M KNO3 , 0.025 M CuSO4, 0.025 M Ca(NO3)2, and 0.025 M KCl . include waters of hydration when clculating the formula wights.
The product in the 3rd step of this multi-step synthesis, p-aminobenzoic acid (PABA), was a common ingredient in sunscreen lotions. PABA is such an effective sunscreen due to the many resonance structures that can be drawn for this molecule.
how can their efficiency be less than 100 and the law of conservation of energy still be valid? 9. an incandescent
If a 180mg piece of gold (density =19.32g/cm^3 ) is hammered into a sheet measuring 2.1ft x 1.0ft , what is the average thickness of the sheet in meters?
The boiling point of another member of this homologous series was found to be 309 . What is the likely molecular formula for this compound
If a sample of Mg is not fully thermally decomposed during the procedure, will the mole ratio of Ca to CO2 be higher or lower? Explain.
Calculate the concentration of each reactant in trials 1 through 5 after the flasks contents have been combined but before the reaction takes place.
Sodium thisulfate, Na2S2O3, is used as a fixer when developing photographic film. What is the mass in grams of Na2S2O3 needed to make 100ml of a 0.25 solution?
The number of different constitutional isomers that can be drawn for C2H4Br2 is equal to
Supposed you have a beaker of water that is being heated on a hot plate. If you are studying the amount of heat that is requred to change the water temperature by a certin amount. What is a reasonable choice for the system and surroundings?
Compute the mass of air in an air-filled tire and the also determine the mass of He in a helium-filled tire
Consider a voltaic cell which has a copper electrode immersed in a solution of copper (II) sulfate and a zinc electrode immersed in a solution of zinc sulfate. determine Eocell. If the concentration of zinc sulfate is 10 times greater than the con..
What is the system that is buffered, what is the pH of the system and what compounds are responsible for the buffered system?
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