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Titration with an indicator is a common technique that chemists use when counting moles.
a ) Would this technique be useful for determining the pH of a water sample from a lake or stream?
b) Can this technique determine if a lake or stream is affected by acid rain?
In the Bohr model, the potential energy of a hydrogen atom in the nth orbit has a value we will call Un. What is the potential energy of a hydrogen atom when the electron is in the (n+1)th Bohr orbit. (Give your answers in terms of Un and n.)
Do you think a 3.5-times multiple is appropriate for American Greetings? If not what multiple of EBITDA do you think is justified. Explain what is the implied share price that corresponds to that multiple
At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175..
What volume of O2(g) is required in the combustion at 25C and 1.00 atm if 9,818kJ are evolved?
what is the molecular formula of a compound that contains 28.2% of potassium ,25.6% of chlorine and 46.2% of oxygen ? the molar mass is 138.5u.
Calculate q, and determine whether heat is absorbed or released when a system does work on the surroundings equal to 64 J and ?U = ?213 J.
Utilizing bond energies, compute the enthalpy change for the burning of one mol of acetylene gas with excess oxygen gas yielding carbon dioxide gas as well as gaseous water (steam)
in the alkylation of cyclopentanone better yields are obtained by first reacting cyclopentanone with an equivalent of
in general ionization energies increase across a period from left to right. explain why the second ionization energy of
It would be possible for the carbocation to proceed to a product other than the alcohol discussed in the Experimental writeup without changing out kinetics calculation. Write the structure of another organic product
Problem- What types of crystals are formed by the following solid elements and compounds: C, CCl2F2, CaCO3, and NH4F? In each case, state the type of forces among the particles that make up the lattice.
You have 5 L of an ideal gas at 25 ºC and 5 bar are expanded to a final pressure of 1.00 bar. Assuming Cv=3/2 R, calculate deltaU, deltaH, q, w, and DS if the process is:
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