a 64 muCi samole of T1-201 decays to 4 muci in 12 days.how long will it...
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64 muCi samole of T1-201 decays to 4 muci in 12 days.how long will
it...
4. A radioactive substance decays from 25.0 g to 12.0 g in 4 hours. Determine the...
4. A radioactive substance decays from 25.0 g to 12.0 g in 4 hours. Determine the half life of the substance. How long will it take to become 3.0 g staring from its original mass of 25 grams?
42. (20pts) 2N20s 4 NO2 +02 Rate = k[N2O5], k=4.0x10-3 (1/s) at certain temperature. a) What...
42. (20pts) 2N20s 4 NO2 +02 Rate = k[N2O5], k=4.0x10-3 (1/s) at certain temperature. a) What is halflife t and how long does it take for N20s concentration to drop to of its original value? b) If the reaction is second order and initial concentration of N20s is 0.01, what is half- life ti and how long does it take for N205 concentration to drop to of its original value? If the reaction is zero order and initial concentration of...
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k...
Half-life equation for first-order reactions: t1/2=0.693k where t1/2 is the half-life in seconds (s), and k is the rate constant in inverse seconds (s−1). a) What is the half-life of a first-order reaction with a rate constant of 4.80×10−4 s−1? b) What is the rate constant of a first-order reaction that takes 188 seconds for the reactant concentration to drop to half of its initial value? Express your answer with the appropriate units. c)A certain first-order reaction has a rate constant...
Quiz 9. 2N20 4 NO2 O2 Rate k[N2O], k-4.0x10-3 (1/s) at certain temperature. a) What is...
Quiz 9. 2N20 4 NO2 O2 Rate k[N2O], k-4.0x10-3 (1/s) at certain temperature. a) What is half-life and how long does it take for N205 concentration to drop to 1o of its original value? b) If the reaction is second order and initial concentration of N20 is 0.01, and k value stay at 4.0x10-3, what is half-life and how long does it take for N2O5 concentration to 10 drop to of its original value? c)If the reaction is zero order...
A recent study has shown that monochloramne, NH2Cl, “decays” in wastewater is very slow, especially in...
A recent study has shown that monochloramne, NH2Cl, “decays” in wastewater is very slow, especially in comparison with free chlorine, HOCl and OCl‐. The exposure of NH2Cl to light was found to increase the rate of decay significantly. When light was completely excluded from the sample, 20 percent decay took place in 8 hours and the data conformed to the first‐order rate law. (a) Assuming (1) a treatment planet is discharging effluent containing 1 mg/L NH2Cl as Cl2; (2) a...
6. For a first order reaction with k .00021/min, how long would it take for the...
6. For a first order reaction with k .00021/min, how long would it take for the reactant concentration to drop to one half its original concentration? If you do not have enough information to calculate an answer, what information would you need?
The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A]...
The half-life of a reaction,
t1/2, is the time it takes for the reactant concentration [A] to
decrease by half. For example, after one half-life the
concentration falls from the initial concentration [A]0 to [A]0/2,
after a second half-life to [A]0/4, after a third half-life to
[A]0/8, and so on. on. For a first-order reaction, the half-life is
constant. It depends only on the rate constant k and not on the
reactant concentration. It is expressed as t1/2=0.693k For a...
1- A cylinder has a diameter of 12 inches, is 8 inches long, and has a...
1- A cylinder has a diameter of 12 inches, is 8 inches long, and has a 4 in ram / rod extending from one side. This is connected to a pump rated at 1.5 GPM and 1,500 PSI. What is the max load the cylinder can (push / extend)? 2- A cylinder has a diameter of 12 inches, is 8 inches long, and has a 4 in ram / rod extending from one side. This is connected to a pump...
what is the answer of 12 and 13 estimated as equivalent to that released by 20.000...
what is the answer of 12 and
13
estimated as equivalent to that released by 20.000 tons of TNT. Assume 200 MeV is released when a 235 U nucleus absorbs a neutron and fission that 3.8 x 10' J is relensed during detonation of 1 ton of TNT. nuclear fissions occurred at Hiroshima, and what was the total de mass? utron and fissions and of 1 ton of TNT. How many was the total decrease in Scanned by CamScann 1.9...
Thank you in advance! Question 5 -- 12 In the long run, money demand and money...
Thank you in advance!
Question 5 -- 12 In the long run, money demand and money supply determine (1) the value of money but not the real interest rate. (2) the value of money and the real interest rate. (3) neither the value of money nor the real interest rate. (4) the real interest rate but not the value of money. Question 6 (-/2 ) When the money market is drawn with the value of money on the vertical axis,...
4. A radioactive substance decays from 25.0 g to 12.0 g in 4 hours. Determine the half life of the substance. How long will it take to become 3.0 g staring from its original mass of 25 grams?
42. (20pts) 2N20s 4 NO2 +02 Rate = k[N2O5], k=4.0x10-3 (1/s) at certain temperature. a) What is halflife t and how long does it take for N20s concentration to drop to of its original value? b) If the reaction is second order and initial concentration of N20s is 0.01, what is half- life ti and how long does it take for N205 concentration to drop to of its original value? If the reaction is zero order and initial concentration of...
Quiz 9. 2N20 4 NO2 O2 Rate k[N2O], k-4.0x10-3 (1/s) at certain temperature. a) What is half-life and how long does it take for N205 concentration to drop to 1o of its original value? b) If the reaction is second order and initial concentration of N20 is 0.01, and k value stay at 4.0x10-3, what is half-life and how long does it take for N2O5 concentration to 10 drop to of its original value? c)If the reaction is zero order...
6. For a first order reaction with k .00021/min, how long would it take for the reactant concentration to drop to one half its original concentration? If you do not have enough information to calculate an answer, what information would you need?
The half-life of a reaction,
t1/2, is the time it takes for the reactant concentration [A] to
decrease by half. For example, after one half-life the
concentration falls from the initial concentration [A]0 to [A]0/2,
after a second half-life to [A]0/4, after a third half-life to
[A]0/8, and so on. on. For a first-order reaction, the half-life is
constant. It depends only on the rate constant k and not on the
reactant concentration. It is expressed as t1/2=0.693k For a...
what is the answer of 12 and
13
estimated as equivalent to that released by 20.000 tons of TNT. Assume 200 MeV is released when a 235 U nucleus absorbs a neutron and fission that 3.8 x 10' J is relensed during detonation of 1 ton of TNT. nuclear fissions occurred at Hiroshima, and what was the total de mass? utron and fissions and of 1 ton of TNT. How many was the total decrease in Scanned by CamScann 1.9...
Thank you in advance!
Question 5 -- 12 In the long run, money demand and money supply determine (1) the value of money but not the real interest rate. (2) the value of money and the real interest rate. (3) neither the value of money nor the real interest rate. (4) the real interest rate but not the value of money. Question 6 (-/2 ) When the money market is drawn with the value of money on the vertical axis,...
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