Question

4)
Which of the following is a zero of p(t) = t (t +t-6)
(A) 0
(B)-2 (C) -3
(D) 1​

Answer 1

Answer:

20%completedreactionmeans

leftamountA=80

initialamountA

∘

=100andthereactioniscompletedint=10s

Similarlyfor50%,

leftamountA=50

initialamountA

∘

=100

A=A

∘

−kt

80=100−k×10

k×10=20

k=2moll

−1

s

−1

A=A

∘

−kt

50=100−2×t

2t=50

t=25s