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A certain anesthetic contains 64.9 percent C 13.5 percent H and 21.6 percent O by mass. At 120°C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g. Explain what is the molecular formula of the compound?
calculate the mass of propylene glycol c3h8o2 that must be added to 0.340 kg of water to reduce the vapor pressure by
At some temperature, a chemist found the following equilibrium concentrations. [Fe3+] = 6.63 10-3 M, [SCN-] = 7.36 10-3 M, [FeSCN2+] = 4.34 10-2 M
what mass of MgNH4PO4 precipitated when 200 mL of 1%(w/v) solution of MgCl2 were treated with 40 mL of 0.1753 M Na3PO4 and excess of NH4+ what was the molarity of the excess reagent (Na3PO4 or MgCl2) after the precipitation was complete
A 147 gram piece of metal has a density of 7.00 g/mL. A 50 mL graduated cylinder contains 20.0vmL of water. What is the final volume after the metal is added to the graduated cylinder?
A compound contains: 23.71% O, 23.76% S, 52.47% Cl. If it takes 46 seconds for this compound to effuse through the same plug through which the same amount of Argon, Ar, passed in 25 seconds. What is the molecular formula of the compound
Metals such as magnesium and zinc react with dilute sulfuric acid to give hydrogen, according to the equation: M (s) + H2SO4 (aq) -------> MSO4 (aq)
In the laboratory, a student named Georgia weighed 4.75 grams of an unknown solid mixture containing benzoic acid, copper (II) sulfate and sand. She added 15mL of acetone to her sample. Which component of the mixture is dissolved in the acetone?
Using data from the following reactions and applying Hess's law, calculate the heat change for the slow reaction of zinc with water (answer must be in kJ/mol Zn)
If the reaction between iron (III) ion and thiocyanate ion yielded an equilibrium concentration of .30 M for each of these ions, what is the equilibrium concentration of the red iron (III)-thiocyanate complex
assume that you have 1 2 5 and 10 ml pipets and a 25 ml volumetric flask. describe in detail how you would prepare a
calculate the pH of the solution that results from adding 8.50ml of 0.100M NaOH to 50.00 mL of a 0.0500M solution of acetic acid.
What region of the electromagentic spectrum does this belong to, the frequency of this energy and the energy in J/photon and kJ/mole?
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