CBSE Class 12-science Answered
Please ans both part
![question image](http://images.topperlearning.com/topper/new-ate/450137doubt1.jpg)
Asked by amitkumar.cis | 14 Jan, 2021, 12:40: PM
Rate constant can be calculated in first order reaction-
![k equals 1 over 30 2.303 log fraction numerator 30 minus left parenthesis negative 15 right parenthesis over denominator 20 minus left parenthesis negative 15 right parenthesis end fraction equals 1 over 30 log 45 over 35
t subscript 1 divided by 2 end subscript equals 75 space m i n
k equals 1 over t 2.3 log fraction numerator 45 over denominator 0 minus left parenthesis negative 15 right parenthesis end fraction
t equals 120 space m i n u t e s
fraction numerator 30 minus left parenthesis negative 15 right parenthesis over denominator x minus left parenthesis x minus 15 right parenthesis end fraction equals 2 n d space a t space h a l f space t i m e
45 left parenthesis x plus 15 right parenthesis equals 2
x plus 15 equals 45 over 2
x equals 22.5 minus 15 equals 7.5 to the power of o](https://images.topperlearning.com/topper/tinymce/cache/f7d1233fa67e0f52ca4ba834a0463bb0.png)
Answered by Ravi | 18 Jan, 2021, 11:52: AM
Concept Videos
CBSE 12-science - Chemistry
Asked by amitkumar.cis | 14 Jan, 2021, 12:40: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 28 Mar, 2014, 10:16: AM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 09:20: AM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 09:17: AM
CBSE 12-science - Chemistry
Asked by Topperlearning User | 22 Jun, 2016, 09:18: AM