Why does a split petrol forms a slick on top of water
1 answer:
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Answer: e. 4.8 h
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 rate constant
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
b) for 160.0 g to decay to 2.07 g
The time required for a 160.0-g sample of 158Eu to decay to 2.07 g is 4.8 hours