Problem related to specific heats
Question: Substances A and B are the same mass and at the same initial temperature. When they are heated, the final temperature of A is 55 degree C higher than the temperature of B. What does this tell you of the specific heats of A and B.
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Calculate D for hemoglobin in water at 25 degrees celsius ( ? = 0.89 cP ), given that Vm= 48000 cm^3/mol for hemoglobin. Assuming the molecules are spherical and estimate the volume of a molecule as Vm/ Na.
How many liters of water vapor are produced when 23.8g of NH4NO3 decomposes?
What is the pH of a buffer solution that is 0.255 M in lactic acid and 0.333 M in sodium lactate? The Ka of lactic acid is 1.4 × 10-4.
What is the empirical formula? If the molar mass of the chlorine oxide is 356.7 g/mol, what is the molecular formula of the compound?
Assuming an ideal solution, what is the predicted freezing point of a 0.01 m (molality) aqueous solution of NaHPO4? Kf of water = 1.86 deg C/m.
Calculate the theoretical yield in grams of the precipitate formed. 3. If the actual yield of the experiment was 90.5 mg, what is the % yield of Ag3PO4
Benzene freezes at 5.45oC. The Kf for benzene is - 5.07 oC/m. What would be the freezing point of a 0.210m solution of octane in benzene?
Salicyclic acid forms a polymeric byproduct as a result of this reaction. It is a small percentage of the final product mixture, but it can be visualized via TLC (the small spot just above the aspirin). Provide a balanced chemical equation for the
Calculate (a) the work done when the gas expands isothermally against a constant external pressure of 200 Torr until its volume has increased by 3.6 dm3.
When the reaction 2 H2S g ~ PCl3 + Cl2 is carried out at 1065 degrees celcius, Kp = 0.012. Starting with pure H2S at 1065degrees, what must the initial pressure of H2S be if the equilbrated mixture at this temperature is to contain 0.250 atm of H2
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