St is very desirable that pesticides eventually decompose in the environment to give harmless products. Let us assume the half-life for the first order decomposition of a certain pesticide is 10.2 years. If the present concentration of a pesticide in a lake is 3.0 x 10-8 M, what was the concentration 4.00 years ago?

Q: The half-life for the first-order decomposition of N2O4 is 1.3 x 10^-5 s. N2O4 (g) yields 2NO2 (g).…

A: • N2O4(g) ⇌ 2NO2(g)It follow first order kineticsrate = KN2O41By solvingK = 2.303t log AoAty2  =…

Q: Decay of a pollutant is a 1st order reaction with a half-life of 55 days. How many days are needed…

A: If initial concentaration= 100 Final concentration= 100-90=10

Q: A radioisotope of iodine, 131I, is used to study thyroid function. A patient is given a sample that…

A: Since the decay process is first order  Hence we can say that  A = A0eKt  where A = final…

Q: At 25 °C, the decomposition of dinitrogen pentoxide,N2O5(g), into NO2(g)and O2(g) follows…

A: Since the decomposition reaction is first order with respect to the reactant. And since we know that…

Q: The 1st order rate constant for the decomposition of N,Os to NO, and O, at 70 °C is 6.82 x 10-3 s1,…

A: Chemical Kinetics is the branch of chemistry that deals with the rate of the chemical reaction. like…

Q: One of the least abundant nitrogen oxides in the atmosphere is dinitrogen pentoxide. One reason…

A:

Q: What is the half-life for the decomposition of NOCl when the concentration of NOCl is 0.15 M? The…

A: Given information: The initial concentration of NOCl is 0.15 M The rate constant for second order…

Q: Phosphine, PH3, is a colorless, toxic gas that is used in the production of semiconductors as well…

A:

Q: The decomposition of dimethylether at 504 °C is first order with a half-life of 1570 seconds. What…

A: Half-life is the time interval during which the concentration of the reactant becomes half of its…

Q: (a) What is the rate constant k for the first-order decomposition of N2O5(g) at 25°C if the…

A: The relation between concentration of the reactants and the reaction rate of a chemical reaction is…

Q: Calculate time it takes the partial pressure of X too far below the partial pressure of white round…

A: As both the gas decomposes, the partial pressure also decreases. The reason is the partial pressure…

Q: 7. If the half-life for the decomposition of a drug is 6 hours, how long will it take for 125 mg of…

A: Half life = 6 hours Initial quantity = 125 mg Quantity left after time t = 70% (125) mg

Q: The decomposition of a radioactive substance is a first-order reaction. If the half-life of the…

A: Given: Initial concentration=[Ao]=0.360 MFinal concentration=[A]=0.0450 Mt12=69.3 hr To calculate:…

Q: How many half-lives will it take for the concentration of the N20 to reach 25.00 % of its original…

A: Given: The reaction is a first-order reaction. And the final concentration of reactant N2O (Assuming…

Q: Molecular iodine, I2(g), dissociates into iodine atoms at 625 K with a first-order rate constant of…

A: The integrated rate law for first-order reaction can be given as,

Q: A particular reactant decomposes with a half-life of 125 s when its initial concentration is 0.322…

A: Two conditions are given here as; 1st condition; Initial concentration A0 = 0.322 M    Half life…

Q: 1) The decomposition of N2O5 is an important process in the atmosphere. The half life is 2.05 x 10ʻ…

A: It is an example of first order kinetic reaction  Here we are required to find the time for a sample…

Q: Nitrification of water is a biological process for removing ammonia from wastewater as ammonium: NH4…

A:

Q: The first-order decomposition of N20 at 1000 K has a rate constant of 0.76 s. If the initial…

A:

Q: A possible reaction for the degradation of the pesticide DDT to a less harmful compound was…

A: Consider the given information is as follows; Order of the reaction = 1 (First order)         Rate…

Q: For the reaction of BF, (g) + NH, (g) F,BNH, (g) the second-order rate constant k at 100° C is 3.41…

A: Given chemical Reaction is of 2nd order reaction. Rate constant (k) = 3.41 M-1S-1  Initial…

Q: • The decomposition of SO,Cl, is first order in S0,Cl, and it has a half-life of 4.1 hours. If you…

A: Given data contains, Half-life is 4.1 hours. Initial concentration of SO2Cl2 is 1.6×10-3 mol. Final…

Q: The decomposition of hydrogen iodide on finely divided gold at 150°C is zero order with respect to…

A: i) Since we know that the relationship between the concentration of reactant i.e [A] and time for a…

Q: A Zero-order decomposition reaction of a substance took 4 minutes to achieve 30%  decomposition.…

A: Given, A Zero-order decomposition reaction of a substance took 4 minutes to achieve 30%…

Q: A kinetics study of a reaction, A +B -C, is found to be zeroth order with respect to A and second…

A: Rate of the reaction depends on order of the reaction

Q: Iodine atoms combine to form I2 in liquid hexane solvent with a rate constant of 1.5 * 1010 L/mol #…

A: Second order reactions are defined as those chemical reactions where sum of exponents in rate law of…

Q: The half life for the first order decomposition of nitromethane, CH,NO,, at 500K is 650 seconds. If…

A:

Q: The rate constant for the first-order decomposition of cyclobutane, CaHa at 500 °C is 9.2 x 103 CaHe…

A: For first order reaction t1/2 = ln(2)/k   k = 9.2 × 10^(-3)

Q: The decomposition of dimethyl ether (CH3OCH3) to methane, carbon monoxide, and hydrogen gases is…

A: (a) For first-order reaction: k=2.303t logA0At where, k = rate constant t = time = three quarters of…

Q: Experimental data collected for the reaction shown below indicated the reaction is zero order with…

A:

Q: 48. The decomposition of dimethylether at 504 deg C is first order with a half-life of 1570 seconds.…

A: According to the radioactive decay, the rate equation is : Kt = 2.303 log [A 0] / [At ] Where K =…

Q: How long (in s) would it take

A:

Q: Archaeologists can determine the age of artifacts made of wood or bone by measuring the amount of…

A:

Q: The decomposition of N2O2 is an important process in tropospheric chemistry. The half-life for is…

A: When a reaction follows first order rate law, integrated  rate equation is Nt=Noe0.693×tt12whereNt =…

Q: inutes at 600 K. If you b

A: First order reaction- A chemical reaction in which the rate of reaction is directly proportional to…

Q: It took 774.7 s for 42.04% of a substance to react according to first-order kinetics. What is the…

A: K = 2.303/t log (a/(a-x)) where K = first order rate constant = ? s-1 t = time taken = 774.7 s a =…

Q: The decomposition of gaseous dinitrogen pentaoxide (N2O5) to NO2 and O2 is a first-order reaction.…

A:

Q: The decomposition of radioactive iodine is a first-order process with a half-life of 8 days. If the…

A: Half-life is the time required for the reaction to be half completed. It is denoted by t1/2 . For a…

Q: At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10-…

A: The concentration of the reactant at time 't' is given by,     [A]t = [A]oe-kt where, [A]o is the…

Q: The decomposition of ammonia on a tungsten (W) surface is zero-order and has a rate constant of 0.75…

A: Given, Decomposition of ammonia (NH3) on a tungsten surface. The following reaction follows zero…

Q: The first-order decomposition of N2O at 1000 K has a rate constant of 0.76 s-1. If the initial…

A: Concentration of N2O after 9.6 s can be determined using the given formula,

Q: A possible reaction for the degradation of the pesticide DDT to a less harmful compound was…

A: In the given question we have to calculate the half-life for the degradation of DDT in years. Given…

Q: The decomposition of N2Os is an important process in tropospheric chemistry. The half-life for the…

A: Two numerical problems based on first order kinetics, which is to be accomplished.

Q: A second-order decomposition reaction run at 550°C has a rate constant of 5.6x10^-2 L/(mol*s) . If…

A: Order of a reaction is the power dependence of the rate on the concentration of reactants. The rate…

Q: The decomposition of N205 is a first-order reaction. If the half- life time is equal to 1114 second,…

A:

Q: Iodine atoms will combine to form I2 in liquid hexane solvent with a rate constant of…

A: Given, Rate constant = 1.5*1010 L/mol s. Reaction is second order with respect to iodine. Initial…

Q: The first order rate constant for the decomposition of N2Os to NO2 and 02 at 70 °C is 6.82 x 10 s.…

A:

Q: The decomposition of hydrogen iodide into hydrogen and iodine is a second order reaction. The rate-…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: The decomposition of N2O4 is second order in N2O4 and has a rate constant of 7.02 x 10^(-3) M^(-1)…

A: Given:Initial concentration = 0.100 MRate constant = 7.02×10-3 M-1.s-1