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Fermium-253 has a half life of 0.334 seconds. A radioactive sample is considered to be completely decayed after 10 half lives. How much time will elapse for this sample to be considered gone?
Br2 (g) + 3F2 (g) ? 2BrF3 (g) Explain what volumes of Br2 and of F2 measured at the same temperature also pressure are needed to prepare 50.0mL of BrF3
Are the lone pairs participating in a 8 member ring, with one corner of the ring being a nitrogen (heterocycle) attached to a hydrogen and with three pi bonds on the ring between carbons, 2-3, 4-5, 6-7. is the lone pair from nitrogen participating..
A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25 degrees C. The initial concentrations of Pb2+ and Cu2+ are 5.00×10^?2 M and 1.50 M , respectively.
What is the concentration for each substance at equilibrium for the following gaseous reaction if the initial concentration of ethene,
The elementary steps for the formation of nitrogen and water from nitric oxide and hydrogen are given below. Identify any intermediates. 2 NO(g) ? N2O2(g) N2O2(g) + H2(g) ? N2O(g) + H2O(g) N2O(g) + H2(g) ? N2(g) + H2O(g)
1. explain what happens to pressure on the molecular level when the number of moles of gas is increased at constant
Why do we convert temperatures to kelvin when doing the gas law calculation? Why do we designate standard conditions for temperature and pressure?
Explain which alkyne below would give two different ketones in approximately the same amount with the H2SO4 / Hg2+ catalyzed addition of water
Most electrical energy in the United States is generated in large-scale power cycles through conversion of thermal energy to mechanical energy, which is then converted to electrical energy
The enzyme D-amino acids oxidase has a very high turnover number because the D-amino acids are potentially toxic. The Km for the enzyme is in the range of 1 to 2 mM for the aromatic amino acids and in the range of 15 to 20 mM for such amino acids ..
Express the van der Waals parameters a = 0.751 atm dm^6 mol^-2 and b = 0.0226 dm^3 mol^-1 in SI base units
A solution of KHC2O4.H2C2O4.2H2O three replaceable hydrogen is 0.200 N as an acid. Explain what is its normality as reducing agent
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