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What is the half-life at 0? At 171 min? Does it increase or decrease? Zero, first, or second reaction? What is the rate constant?
A coffee-cup calorimeter contains 140.0 g of water at 25.2 *C. A 122.0 g block of copper metal is heated to 100.4 *C by putting it in a beaker of boiling water.
Question- Will 28.7 grams of SiO2 react completely with 22.6 grams of H2F2? If not, state which is the limiting reagent.
a reaction has a rate constant of 1.28times10-4 s at 27 c and 0.232 s at 27c and .231 s 77 at c.?what is the activation
Compounds with nearly identical molar masses often have very different physical properties. Choose the compound with the lower value:
2.1417 x 103 mg of a homoatomic diatomic ideal gas occupies a volume of 1.37 x 103 cc at a temperature of 25 deg C and a pressure of 16.14 in. Hg Explain What is the identity of the gas
1. What are all of the decomposition reactions? 2. Identify the spectator ions in the following reaction:
Electron affinity can be defined for molecules just as it is defined for single atoms. Write a complete chemical equation representing the electron affinity of OH. Include all relevant state symbols ((s), (g), etc.)
titrating a solution containing 25 mL of 0.0100 M MgCl2 solution, 1 mL of NH3OH buffer, and 10 drops of Calmagite with EDTA. Calculate the concentration of EDTA. Report the answer with three sig figs.
Trifluoroiodomethane, CF3-I, undergoes free radical addition to alkenes. Explain the fact that the free-radical addition of this compound to 2-methyl-2-butene is faster than its addition to 1-pentene.
1. what mass of naohsnbspmust be added to 300 ml of hcl 0.25 m in order to completely neutralize this acid?2. during a
Explain the half-life of tritium (hydrogen-3) is 12.3 yr. If 61.6 mg of tritium is out from a nuclear power plant during the course of an accident, explain what mass of this nuclide will remain after 12.3 yr
Freon-12 is used as a refrigerant in central home air conditioners. The rate of effusion of Freon-12 to Freon-11 (molar mass=137.4g/mol) is 1.07:1. The formula of Freon-12 is one of following: CF4 , CF3Cl , CF2Cl2 , CFCl3 , OR CCl4 . Which formula..
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