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Problem- A block has a mass of 11.21 g and sides of length: 10.3 mm, 17.2 mm, 17.7 mm. What is its density in g/cm3?
Rework your solution from the beginning and check each step carefully.
Calculate the enthalpy change in kilojoules when some KOH is added to 47.727 g of water and the temperature increases
Some anesthetic drugs relieve pain by interfering with various parts of the action potential (discussed in class). Give a brief description of how the two drugs below may work as pain-blockers.
What fraction of collisions will have sufficient energy to react for a gas whose activation energy is 68 kJ/mol at 25C
Suppose you were to prepare a buffer solution using ammonia and ammonium chloride. What would be the molar ratio of acid to its conjugate when the pH was adjusted to each of these values
The crystalline form of silver (Ag) is composed of face-centered cubic unit cells. If the density of silver is 10.48 g/cm3 at room temperature
Calculate the enthalpy change for the reaction, assuming that the solvation enthalpies of the sugars are negligible. Draw an energy profile for the overall process.
A hypothetical metal has a face-centered cubic unit cell with the edge length of 4.566 Å. Calculate the radius of the metal atom.
Calculate the energy, in joules, required to excite a hydrogen atom by causing an electric transition from the n=1 to the n=4 principal enegry level
sample of KHP requires 19.27mL of NaOH to reach the end point. What is the concentration of NaOH?
Draw three resonance structures for the molecule OCS use these atom arrangement Indicate formal charges for each resonance structure and select the one that contributes the most to the description of this molecule
Calculate the pH of a solution formed by mixing 65 mL of 0.30 M NaHCO3 with 75 mL of 0.30 M Na2CO3
find the amount of known substance present in the mixture.a mixture of calcium carbonate and calcium oxide that weighed
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