For unknown reaction half mole of reactant of total 2 moles reactant is converted in to product time is taken 1 hour.Then calculate how many moles of reactant is present after 4 hours?

Options

A. 0.225 mole
B. 0.425 mole
C. 0.125 mole
D. 0

Answer

C

Explanation

2 mole `to` for 1 mole After 1 hour `tot_((1)/(2))` Hr.
After 1 hour `(1)/(1)` mole
`t_((1)/(2))`=1Hour so After 2 hour 0.5 mole
`therefore` every `t_((1)/(2))` time After 3 hour 0.250 mole
After 4 hour 0.125 mole