Concept explainers
(a)
Interpretation:
K-40 has a
To write a balanced
Concept Introduction:
According to the law of conservation of mass the sum of the
(b)
Interpretation:
K-40 has a natural abundance of 0.012% and a half-life of 1.30 x 109yr. K-40 decays to Ca-40 or to Ar-40. Activity for K-40 is 7.0 µCi per gm.
To identify the particle emitted for each type of decay.
Concept Introduction:
Radioactive decay is the process by which an unstable atomic nucleus loses energy by emitting radiation, such as an alpha particle, beta particle with neutrino.
(c)
Interpretation:
K-40 has a natural abundance of 0.012% and a half-life of 1.30 x 109yr. K-40 decays to Ca-40 or to Ar-40. Activity for K-40 is 7.0 µCi per gm.
To find the number of K+ ions in 3.5 oz of KCl
Concept Introduction:From the mass and molar mass of a substance, number of moles can be calculated as follows:
(d)
Interpretation:
K-40 has a natural abundance of 0.012% and a half-life of 1.30 x 109yr. K-40 decays to Ca-40 or to Ar-40. Activity for K-40 is 7.0 µCi per gm.
To find the activity of 25g of KCl in becquerels
Concept Introduction:
An arithmetical multiplier which is used for converting a quantity expressed in one unit into another equivalent set of units is said to be conversion factor.
The conversion factor used to convert curie to becquerel is as follows:
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