in Education by
A first order reaction has a rate constant 1.15×10-3s-1 . How long will 5g of this reactant take to reduce to 3g ` ? Select the correct answer from above options

1 Answer

0 votes
by
Correct Answer - 444s Initial amount (a)=5g Amount reduce to (a-x)=3g t= 2.303 k log a (a-x) = 2.3 1.15×10-3s-1 log 5g 3g =2.00×103log(1.667)s =2.00×103×0.2219s =443.85≈444s

Related questions

0 votes
    The rate constant for a first order reaction is 60s-1 . How much time will it take to reduce the initial ... 1/16th value ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    The rate constant for the first order decompoistion of a certain reaction is described by the equation logk(s-1)= ... periof be 256min? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    What is the order of reaction whose rate constant has the same units as rate of reaction ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    Calculate the half life of a first order reaction from their rate constants given below : a.200s-1 ,b.2min-1 ,c.4years-1 Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    The concentration of a reactant changes form 0.03M to 0.02M in 25min. Calculate the average rate of reaction ... minutes and seconds. Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    A reaction is first order in A secod order in B : (i) write differential rate equation. (ii) How is the rate ... A and B is doubled? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    A reaction is second order with respect to a reaction. How is the rate of reaction affected if the (a) doubled, (b) reduced to 1/2 ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    For a reaction, A+B→ Product, the rate law is given by r=k[A] 1 2 [B]2 . What is the order of the reactio ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with t1/2=3. ... after 8hr ? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    For the reaction : 2A+B→A2B the rate =k[A][B]2 with k=2.0 10-6mol-2L2s-1 . Calculate the initial rate of ... is reduced to 0.06molL-1 . Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    The rate constant for the decomposition of hydrocarbons is 2.418 10-5s-1 at 546K . If the energy of ... pre- exponential factor? Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    Consider the reaction : Cr2O 2- 7 +14H++6e-→2Cr3++7H2O What is the quantity of electricity in coulombs needed to ... Cr2O 2- 7 ? Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
0 votes
    From the rater expression for the following reactions, determine their order of reaction and dimensions of the rate ... k[C2H5Cl] Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    What type of plot is obtained for rate versus time for zero order reaction gt Select the correct answer from above options...
asked Jan 4, 2022 in Education by JackTerrance
0 votes
    The cell in whiCHM the following reaction occurs : 2Fe3+(aq)+2Ic-(aq)→2Fe2+(aq)+I2(s) has Ec- _(cell ... constant of the cell reaction. Select the correct answer from above options...
asked Jan 5, 2022 in Education by JackTerrance
...