Tritium has a half-life of 12.33 years. what percentage of a sample will remain after 5 years have passed? round to 3 sig figs.

75.8 %

Explanation:

Half-life of tritium= 12.33 years

First we have to calculate the rate constant, we use the formula :

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

where,

k = rate constant  =

t = age of sample  = 5 years

a = let initial amount of the reactant  = 100 g

a - x = amount left after decay process  = a g

Now put all the given values in above equation, we get

Thus 75.8 percentage of a sample will remain after 5 years have passed.

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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