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11 Nov 2019
Find the rate law, calculate the rate constant and determine the overall reaction order for the reaction H_2 + I_2 rightarrow 2 HI from the following data at 450 degree C. Show/explain your work using correct units and sig. figs. At 25 degree C, hydrogen iodide breaks down very slowly to hydrogen and iodine: Rate = k[HI]^2. The rate constant at 25 degree C is 2.4 times 10^-21 L mol^-1 s^-1. If 0.0100 mol HI (g) is placed in a 1.0-liter container, how long will it take for 10.0% of the HI to react?-i.e. how long will it take for the concentration of HI to reach 0.00900 mol/L? Show your work using units and sig. figs. A decomposition reaction has a rate constant of .0012 yr^-1. a. What is the order of this decomposition reaction? b. What is the half-life of the reaction? c. How long does it take for [reactant] to reach 22.3% of its original value? The radioactive isotope ^40_19 K (t_ = 1.25 times 10^9 yr) is commonly found in rocks where it gradually decays to form ^40_18Ar. Suppose a volcanic eruption melts a large area of rock and all gases are expelled from the hot molten rock. After cooling ^40_18Ar accumulates from the radioactive decay of the ^40_19 K initially present in the rock. When a piece of rock is analyzed it is found to contain 1.38 mmol of ^40_19 K and 1.14 mmol ^40_18Ar. How long ago did the rock cool?
Find the rate law, calculate the rate constant and determine the overall reaction order for the reaction H_2 + I_2 rightarrow 2 HI from the following data at 450 degree C. Show/explain your work using correct units and sig. figs. At 25 degree C, hydrogen iodide breaks down very slowly to hydrogen and iodine: Rate = k[HI]^2. The rate constant at 25 degree C is 2.4 times 10^-21 L mol^-1 s^-1. If 0.0100 mol HI (g) is placed in a 1.0-liter container, how long will it take for 10.0% of the HI to react?-i.e. how long will it take for the concentration of HI to reach 0.00900 mol/L? Show your work using units and sig. figs. A decomposition reaction has a rate constant of .0012 yr^-1. a. What is the order of this decomposition reaction? b. What is the half-life of the reaction? c. How long does it take for [reactant] to reach 22.3% of its original value? The radioactive isotope ^40_19 K (t_ = 1.25 times 10^9 yr) is commonly found in rocks where it gradually decays to form ^40_18Ar. Suppose a volcanic eruption melts a large area of rock and all gases are expelled from the hot molten rock. After cooling ^40_18Ar accumulates from the radioactive decay of the ^40_19 K initially present in the rock. When a piece of rock is analyzed it is found to contain 1.38 mmol of ^40_19 K and 1.14 mmol ^40_18Ar. How long ago did the rock cool?
Trinidad TremblayLv2
2 Jun 2019