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Question: Two grams of naphthalene are solidified in the bottom of a 1.5-in. long, YS-in. diameter glass tube. The air in the tube is assumed to be saturated at the interface and the room air has no naphthalene in it. How long will it take the solid to disappear at 30"C?
Given a 400mg sample of Thorium 231 decomposes via beta emission with a half life of 25.5hours, how long would it take,in day, for the sample to deca down to 25mg
The heat capacity of the calorimeter was 15.7J/K. The final temperature in the calorimeter was 32.4 degree C. What is the specific heat capacity of the mineral?
Draw CI by placing atoms on the grid and connecting them with bonds. Do not identify the charge on each of these species. Include all lone pairs of electron.
Write the chemical equation for the formation of HBr from H and Br atoms. Lone pairs do not need to be included. Using the table of bond energies determine the ?H for the above reaction. (KJ/Mol)
If you wanted to prepare a solution of CO in water at 25 in which the CO concentration was 2.1 mM , what pressure of CO would you need to use
In a typical experiment, you drop a gelatin capsule containing 0.1458 g of an Al-Zn alloy sample into an HCl solution. a) Write the equations that represent the chemical reactions that take place after the capsule has dissolved in HCl?
question you access the roof of a building and throw a ball to the ground with an initial velocity of 12.0 ms at an
How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion. Calculate the molarity of the solution.
A chemist has isolated a new natural product and determined its molecular formula to be C24H40O4. In hydrogenation experiments the chemist found that each mole of the natural product reacted with two moles of H2. How many rings are present in the ..
Formic acid, shown below, is a monoprotic acid, circle the acidic hydrogen. write the formula of the conjugate base after the acidic hydrogen is lost?
Using standard reduction potentials, calculate the standard Ecell, emf, for each of the following reactions. State if each reaction is spontaneous or nonspontaneous
What volume (mL) of the solute ethanol should be added to 6040 g of the solvent acetone to generate a solution that contains 16.0 pph by mass ethanol
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