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How can one draw a best fit straight line on a temperature versus time graph to determine the temperature at which two phases (solid plus melting point) appear. Indicate how the eutectic temperature can be estimated.
Determine the half- life, in hours of iodine-123 If the amount of radioactive Iodine-123 in a sample decreases from 0.4 grams to 0.1 grams in 26.4 hours?
How many grams of H2O can be cooled from 45 degrees C to 15 degrees C by the evaporation of 63 grams of water.
Gaseous hydrogen has a density of 0.0899g/L at 0 degrees Celsius. How many liters would you need if you wanted 1.0078 g of hydrogen?
If a few drops of water on the outside of the hot water syringe used to dispense the 5.00 mL sample into the calorimeter well for the Kcal determination fell into the well
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Explain the process of reduction when referring to metals within the earth. It is possible to have glass and asbestos with identical composition, and yet one is considered hazardous and the other is not.
Celsius and takes 96 seconds. How long would you expect the reaction to take if ran at 50 degrees Celsius?
You dissolve 12.6352 g of potassium iodide in water and bring the volume of solution to 250.0 ml. What is the molar concentration of KI and what volume of 0.0436 molar hydrochloric acid is required to react with 30.0 ml of 0.0278 molar LiOH?
Starting with aziridine, and using 1) PhCH2Br; 2) Na2CO3; 3) PhCH2Br as reagents, what are the mechanisms and intermediates leading to a final product
The equilibrium constant Kc for the decomposition of phosgene, COCl2, is 4.63 10-3 at 527°C. COCl2(g) CO(g) + Cl2(g) Calculate the equilibrium partial pressure of all the components
What is the concentration of [Cr2O7 ^-2] in the first dilution add that is made by adding 1.00 mL of DI water to 5.00 mL of the stock potassium dichromate solution?
Hexafluorosilicic acid is made by the reaction of silica and hydrofluoric acid by the following reaction 6HF + SiO2 ? H2SiF6 + 2H2O ?Hr = -670 kJ/mol
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