Chemistry

The decomposition of A into product has value of k as 4.5×10^3s^−1 at 10∘C and energy of activation of 60 kJmol^−1. At what temperature would k be 1.5×10^4s^−1? The decomposition of A into product has value of k as 4.5×10^3s^−1 at 10∘C and energy of activation of 60 kJmol^−1. At what temperature would k be [...]

The rate constant for the first order decomposition of H2O2 is given by the following equation : log k = 14.34 – 1.25 x 10^4 K/T Calculate Ea for this reaction and rate constant k if its half-life period be 256 minutes. Mention the factors that affect the rate of a chemical reaction. June 4, [...]

The decomposition of hydrocarbon follows the equation k=(4.5×10^11s^−1)e^−28000K/T Calculate the energy of activation (Ea). The decomposition of hydrocarbon follows the equation k=(4.5×10^11s^−1)e^−28000K/T Calculate the energy of activation (Ea). June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with t1/2=3.00hr. What fraction of sample of sucrose remains after 8hr ? Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law with t1/2=3.00hr. What fraction of sample of sucrose remains after 8hr [...]

Consider a certain reaction A→ Products with k=2.0×10^−2s^−1. Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L^−1. Consider a certain reaction A→ Products with k=2.0×10^−2s^−1. Calculate the concentration of A remaining after 100 s if the initial concentration of A is 1.0 mol L^−1. June [...]

The rate constant for the decomposition of hydrocarbons is 2.418×10^−5s^−1 at 546K. If the energy of activation is 179.9 kJ mol^−1, what will be the value of pre−exponential factor? The rate constant for the decomposition of hydrocarbons is 2.418×10^−5s^−1 at 546K. If the energy of activation is 179.9 kJ mol^−1 what will be the value [...]

Show that time required for 99% completion of a reaction is twice the time required to complete 90% of the reaction. Show that time required for 99% completion of a reaction is twice the time required to complete 90% of the reaction. June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

A first order reaction takes 40 minutes for 30% decomposition, Calculate its half life period. A first order reaction takes 40 minutes for 30% decomposition Calculate its half life period. June 4, 2021 Category: Chemistry , NCERT Exemplar Class 12 ,

The rate constant for a first order reaction is 60s^−1. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value ? The rate constant for a first order reaction is 60s^−1. How much time will it take to reduce the initial concentration of the reactant to its [...]

The half life for radioactive decay of .14C is 5730 years. An archaeological artifact containing wood had only 80% of the .14C found in a living tree. Estimate the age of the sample. The half life for radioactive decay of .14C is 5730 years. An archaeological artifact containing wood had only 80% of the .14C [...]