Question

Question from Chemical Kinetics​

Answer 1

Answer:

1) g/8

Explanation:

Using the formula:

M = ((1/2)^n)Mi

M = Mass after n half lives. Mi = Mass of at t=0

Here n = 540/140

n = 4

M = ((1/2)^4)2g

M = 2g/(2)^4

M = g/2^3

M = g/8

This can also be done in following way: n = 4 means 4 times the gas have decomposed to half of its mass.

2g --» 1g --» 1/2 g --» 1/4 g --» 1/8 g