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Problem- What is the molar mass of a nonpolar molecular compound if 5.52 grams dissolved in 36.0 grams of benzene begins to freeze at -1.87 °C? The freezing point of pure benzene is 5.50 °C and the freezing point depression constant, Kfp, is -5.12 °C/m.
Rework your solution from the beginning and check each step carefully.
polonium-218 is an alpha emitter with a half-life of 3.0 minutes. if a sample contains 55 mg of po-218 atomic mass
If 860 liters of neon at 45°C and 800 mm. are decreased to 700 liters at the same pressure, what is the new temperature of this gas?
what is the value of Kc for the following reaction at equilibrium: CO2(g) + H2(g) CO(g) + H2O(g) if [CO]=.20 M, [H2O]=.30 M, [CO2]=.30 M, and [H2]=.033M?
The pressure was readjusted to 4423 torr by moving the piston. What was the volume occupied by the sample under the new conditions if the temperature remained constant throughout
An aqueous solution contains 51.4g of C3H7OH in 127.0g of solution. Explain what is the mole fraction of C3H7OH
Stripping voltammetry is a trace electrochemical technique in which the current is linearly proportional to concentration. A solution of 1.0x10-7 M Pb(II) gave a current of 0.139 mA.
Identify the incorrect names or formulas.
An iron ore sample is found to be 35.00% Fe by mass. How many grams of ore are needed to obtain 454.0 grams of Fe
Emergency treatment of cardiac arrest victims sometimes involves injection of a calcium chloride solution directly into the heart muscle
Explain how many protons must be transported to provide sufficient free energy for the synthesis of 1 mol of ATP assuming standard biochemical conditions
What is the change in the measurement of the potential if a solution of 1.00x10-3 M NaF is exchanged for another solution of 1.00x10-4 M NaF?
a solution of ethanol c2h5oh in water is prepared by dissolving 77.0 ml of ethanol density 0.79 gcm3 in enough water
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