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A sample of naphthalene,which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct and the melting point range small. Explain the gray color.
Why is the boiling point of a cyclohexene and water mixture less than 83 degrees, the boiling point of cyclohexene
The temperature of the calorimeter rises from 22.5 to 25.7 degrees C. Find the nutritional caloric content (Cal/g) of peanut butter. BASED on your calculation, how many Calories are in on serving of peanut butter
As protons transported into cell, ATP synthesis can be coupled to this process by ATP synthase. At 100% efficiency, under conditions above, how many proteins must be transported to synthesize one molecule of ATP?
Why isn't the pH at the equivalence point always equal to 7 in a neutralization titration? When would it be 7?
Calculate the standard heat formation of carbon disulfide, CS2 from its elements { C (graphite + 2 S (rhombic) -----> CS2 (l) }, given that: C (graphite) + O2 (g) -----> CO2
A 250 gram sample of water at the boiling point had 64.0 kJ of heat added. How many grams of water were vaporized. Heat of vaporization for water is 40.6 kJ/mole
How much energy in kilojoules is required to convert 100 mL of water at its boiling point from liquid to vapor?
A gas has a percent composition by mass of 75.7% carbon and 14.3% hydrogen. At STP the density of the gas is 2.50 g/L. What is the molecular formula of the gas
If you want to remove 50% of the moisture in the air at a constant pressure of 100 kPa, to what temperature should you cool the air.
Draw isotherms generated by this equation which are at the critical temperature, above the critical temperature, and below the critical temperature. Also, mark on the sketch the critical volume and the critical pressure for the gas.
What volume (in mL) of 0.220 M NaOH should be added to a 0.135 L solution of 0.028 M glycine hydrocholoride
A first order reaction has a half-life of 1.34 x 10^-3 hours. If the initial concentration of the reactant is 8.00M, what is its concentration after 4 half-lives?
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