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2 answers:
Answer:
the ratio of parent to daughter = 15.38 : 1
Explanation:
The radioactive disintegration is considered to be first order reaction.
The relation between first order rate constant and the half life is:
Let us calculate the rate constant from half life as
The rate law expression for first order reaction is
Where
A0 = initial amount of rubidium isotope = say 100
At= final amount of rubidium isotope after 4.6 billion years
putting all values
1.065=100/At
At=93.897
The amount of daughter isotope formed =100-93.897 = 6.103
the ratio of parent to daughter = 93.897:6.103 = 15.38 : 1
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3 L will be the final volume for the gas as per Charle's law.
Answer:
Explanation:
The kinetic theory of gases has two significant law which forms the backdrop of motion of gases. They are Charle's law and Boyle's law. As per Charle's law, the volume of any gas molecule at constant pressure is directly proportional to the temperature of the molecule.
V∝ T
Since, here two volumes are given and at two different temperatures with constant pressure. Then as per Charle's law, the relation between the volumes of air at different temperature will be
So in this case, V1 = 6 L and T1 = 80° C. Similarly, T2 = 40° C. So we have to determine the V2.
So, 3 L will be the final volume for the gas as per Charle's law.
Explanation:
The scientific notation:
where
and k is integer.
We have the example:
You can write the numbers in a "normal" form:
Make the sum:
And next write it in the scientific notation:
You can add numbers in scientific notation if the power of tens in both number is the same.
Therefore you must convert the first number:
Now, you can make the sum: