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When 12.1g of the sugar sucrose (a non-electrolyte) are dissolved in exactly 800g of water, the solution has a freezing point of -0.082 degrees Celsius. what is the molar mass of sucrose? Kf of water is 1.86 degrees Celsius/m.
A student studied the clock reaction described in this experiment. She set up a reaction mixture by mixing 10mL of 0.010 M KI, 10mL of 0.0010 M Na2S2O3, 20mL of 0.040 M KBrO3 and 10 mL of 0.10 M HCL.
the reaction produces 0.90 mol of CO2 and 0.45 mol of H2O. Determine the number of mols of carbon in the compound. Determine the number of mols of hydrogen in the compound.
When the space shuttle lifts off on a mission from Cape Canaveral, the chemical potential energy of the fuel is converted into
Explain why cis dichloroethene has a boiling point of 60 degrees C while trans - dichloroethen has a boiling point of 48 degrees C.
You add an excess of Ca(OH)2 to water maintained at a particular temperature, stir until the solution is saturated, filter, then determine the [OH-] in the solution by titration with acid
What is the enthalpy of reaction per mole of oxygen bound. The heat capacity of the solution may be assumed to be 4.18J/k cm3
A 1-ft-diameter cylinder is closed on one end and fitted with a moveable piston on the other. With 1 atm applied pressure, the piston is located 20 ft from the closed end
The half-life of tritium (31H) is 12.3 years. If 55.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 49.2 years?
An unknown gas sample with a mass of 3.17 g and a volume of 0.7521 L at 293.0 K under 1.023 atm has CH2Cl for its empirical formula. What are its molar mass and its molecular formula?
Using standard enthalpies of formation from Appendix 2A, calculate the standard reaction enthalpy for the following reaction, the final step in the production of nitric acid
what mass of limestone must have dissolved if 3.05x10^10 kg of calcium hydrogen carbonate was produced? CaCO3(S)+H2CO3(aq)->Ca(HCO3)2(aq)
A 130 mL stock solution contains 1.5 M CuF2. When 11 mL of the stock solution is diluted to 23 mL, what will the concentration of F- ions be?
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