Decomposition of X exhibits a rate constant of `0.5 mu g //` year. How many years are required for the decomposition of `5mu g` of X into `2.5 mu g` ?

The half life period of radium is 1600 years . In how many years 1 g radium will be reduced to 0.125 g ?

N_(2)O_(5(g)) is at a pressure of 0.5 atm. After 100 s the pressure of the decomposition mixture is 0.512 atm. Calculate the rate constant.

Starting from 10g of a radioactive element, 0.25 g was left after 5 years. Calculate The time required for half of the element to decay.

The decomposition of "N"_(2)"O"_(5)(g), i.e.,"N"_(2)"O"_(5)(g)to4"NO"_(2)(g)+"O"_(2)(g) is a first order reaction with a rate constant of 5xx10^(-4)"sec"^(-1)" at "45^(@)C . If intial concentration of "N"_(2)"O"_(5) is 0.25 M, calculate its concentration after 2 min. Also calculate half life for the decomposition of "N"_(2)"O"_(5)(g).

2N_2O_5(g)rarr4NO_2(g)+O_2(g) what is the ratio of the rate of decomposition of N_2O_5 to rate of formation of O_2 ?