Calculate what is the molar mass of the solute
Pure benzene has a normal freezing point of 5.5°C. a solution containing 11.4g of a molecular substance dissolved in 150.0g of benzene (Kf=5.12°C/m) has a freezing point of 1.20°C. what is the molar mass of the solute?
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Morphine (pKb = 5.80) is the active ingredient in opium. It is used as an analgesic that directly acts on the central nervous system to alleviate pain.
The temperature inside a balloon is raised from 25.0 °C to 250.0 °C. If the volume of cold air was 10.0 L, what is the volume of hot air?
What two families of elements in the periodic table generally do not accept additional electrons (i.e. which ones have electron affinities close to or above zero)?
A buffer solution is prepared by mixing 75ml of a 0.275M ofC7H5O2F wilth 55ml of a 0.472M solution of C7H4O2FNa. The pKa ofthis weak acid is 2.90. What is the pH of the buffer solution?
The normal boiling point of ethanol(C2H5OH) is 78.5'C. Using the information from Thermodynamic Data at 1 atm and 25'C, and the following information:
Strontium phosphate is also insoluble in water. knowing calcium phosphate is insoluble, why is it not surprising that strontium phosphate is also insoluble?
Suppose that you are given a 0.700 M acetic acid solution and a 0.500 M sodium acetate solution. Determine the volumes of each solution required to prepare 160ml of a buffer with pH 4.65
You often work with salts of Fe3+, Pb2+, andAl3+ in the laboratory. You are given a solution containing all three of these ions, each at the concentration of0.10M. To separate these ions, you slowly add NaOH solution.
A flexible vessel maintains constant pressure of 300kPA during acombustion process. The vessel has an initial volume of 0.8 m3 and contains astoichiometric mixture of octane (C8H18) gas and air at 25°C.
What is the impact of a catalyst on the rate and equilibrium of a general chemical reaction?
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