What is the osmotic pressure of the solution
69.7 grams of a solute with a molecular mass of 2790 grams are dissolved in enough water to make 1.00 dm(3) of solution at 20 degrees C. What is the osmotic pressure of the solution?
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A 0.692 g sample of glucose, C6H12O6, is burned in a constant volume, bomb calorimeter. The temperature change is measured at 1.80 degrees C. The calorimeter contains 1.05 kg and the "dry" calorimeter has a heat capacity of 650. J/ degrees C. Calc
The rate constant at 25°C is 2.4 10-21 L/mol·s. If 0.0200 mol of HI(g) is placed in a 1.0 L container, how long will it take for the concentration of HI to reach 0.0085?
Use the Nutritional information on the food bag to calculate the calories per gram? How does this information compare to your information? How do you explain the discrepancy? How could you do the experiment differently to get a more accurate value?
Suppose that at a certain instant the volume is 200 ccs, the pressure is 80 kPa, and the pressure is increasing at a rate of 28 kPa/min. At what rate is the volume decreasing at this instant?
What is the velocity of a first-order reaction when the reactant concentration is 6 x 10-2 M and the rate constant is 8 x 103 sec-1?
Manganese makes up 1.3 x 10-4 percent by mass of the elements found in a normal healthy body. How many grams of manganese would be found in the body of a person weighing 183 pounds?
Using equations, explain how a buffer functions. Buffers consist of a solution of a weak acid, HA, and its conjugate base, A, at high concentrations.
For the reaction A --> B, the activation energy is Ea = 125 kJ/mol and the heat of reaction, H = 50 kJ/mol. What is Ea for the reverse reaction in kJ/mol?
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