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The activity of a radioactive element, El, decreased by 2.0 % over one year. What is the half-life of this element in years?
Describes the reaction that can occur when dinitrogen tetroxide
2A(g) + 3B(g) → A2B3(g) If 0.5 atm of gas A is mixed in an evacuated reaction flask with 1.0 atm of gas B, what is the final pressure in the reaction flask? (assume that the reaction goes to completion)
Does this show that they are identical structures? If not what additional TLC experiments might one perform to ascertain the identity of the unknown?
Consider the reversible reaction: A(g) 2B(g) At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Keq?
Questions on chemical equations - Write a balanced equation for this reaction. Include the states of matter for each compound.
After mixing 500mg of XI3 with sufficient Cl2, 236mg of XCl3 are obtained. This represents 100% yield of that reaction. Determine the identity of element X.
A piece of ice weighs 35.0 g. how much energy is required to heat the ice from a solid at -5.0 degrees C to liquid water at 65.0 degrees C?
undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after 9.3 minutes have elapsed?
Calculate the theoretical yield for the bromination of both stilbenes and cinnamic acid, assuming the presence of excess pyridinium tribromide.
a sample of 57 grams of h2o with a temperature of sixteen degree celsius is combined to 260 grams of h2o at 90 degree
How many moles of S2 would you have to have at equilibrium in a 3.68 liter box in which there are 1.63 moles of H2S and 0.864 moles H2
describe the coordination geometry e.g. octahedral for each metal ion and the mxnlm formula for deoxy and oxy form of
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