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CBSE Class 12-science Answered

Please ans both part

Asked by amitkumar.cis | 14 Jan, 2021, 12:40: PM
Expert Answer
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
Answered by Ravi | 18 Jan, 2021, 11:52: AM
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