Answer: 29.0 years
Explanation:
Expression for rate law for first order kinetics is given by:

where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.


b) for decomposition of 80 % of reactant



The age of a suspected vintage wine that is 20 % as radioactive as a freshlybottled specimen is 29.0 years
Answer:
22.4L
Explanation:
The following data were obtained from the question:
P = 1atm
T = 273K
n = 1mole
R = 0.08206 L∙atm/mol∙K
V =?
PV = nRT
V = nRT/P
V = (1 x 0.08206 x 273)/1
V = 22.4L
Answer:
The stronger acid is HBrO3.
Explanation:
It has an additional oxygen making it more electronegative, in turn making it a stronger acid.