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Why is understanding diversity and species richness so challenging for ecologists?
What determines the pitch or frequency of a string on a violin or a guitar? How does a musician get a variety of notes from one string? Explain why the crack of a whip is a "mini" sonic boom.
The fact that boiling point of a pure solvent is lower than the boiling point of a solution of the same solvent is a direct consequence of the. freezing-point depression of the solution.
calculate the final temperature when a 20.4 gram sample of ice at 0oc is placed into a styrofoam cup containing 111
Prepare an electrochemical cell by connecting the negative terminal of a voltmeter to a strip of zinc in a solution of 0.500 M ZnCl2(aq) and the positive terminal to a strip of copper in a solution of 0.100 M CuCl2(aq). The two half-cells are conn..
This sample was reacted with excess ammonia in diethyl ether at 0 c. The product mixture had a specific rotation of -29.9 degrees. If the specific rotation of pure (R) 1-phenyl ethanamine is +39.3 degrees. This reaction resulted in [X] percent inv..
What is the Slater determinant for the GS of Be? I need to also find an expression for its energy in terms of Coulomb and Exchange integrals.
25 g of a certain metal is heated in boiling water and then poured into 90 mL of water initially at 22.0oC. After the water has resumed a constant temperature.
An experiment shows that a 249 -mL gas sample has a mass of 0.433 g at a pressure of 750 mm Hg and a temperature of 29?. What is the molar mass of the gas?
When 0.78 g of an unknown gas in contained solely in a 560 mL container, the pressure is 780 Torr at 5 degrees Celcius. What is the molar mass of the gas in grams/mole?
what is the theoretical yield of vanadium that can be produced by the reaction of 40.0 g of v2o5 with 40.0 g of calcium
Imagine an additional pressure of Cl2(g) = 0.40 atm is then added to the flask. Find the partial pressure of CO in the flask when the system re-establishes equilibrium.
Problem- Calculate the momentum of an electron traveling 42.0% the speed of light. Report answer in kg(m/s)
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