Answer:
See image attached
Explanation:
a)
The full reaction mechanism of step 1 was obtained from Bartleby and attached to this answer. The steps involved in the reaction are:
1) Loss of Br- and formation of a carbocation
2) Attack of CH3CN on the carbocation
4) Formation of a quaternary nitrogen intermediate
5) Attack of water on the quaternary nitrogen intermediate
6) Loss of the water molecule
5) Formation of the amide product
b)
i) sodium hydroxide
ii) HCl
Answer:
The watch is 40.9 years old.
Explanation:
To know how many years old is the watch we need to use the following equation:
(1)
Where:
: is the brightness in a time t = (1/10)I₀
: is the initial brightness
λ: is the decay constant of tritium
The decay constant is given by:
(2)
Where:
: is the half-life of tritium = 12.3 years
By entering equation (2) into (1) we have:
By solving the above equation for "t" we have:
Therefore, the watch is 40.9 years old.
I hope it helps you!
