Oxygen is a mixture of two isotopes O and O with relative abundances of 90% and 10% respectively. The relative atomic mass of oxygen is?
Question 1 Report
Oxygen is a mixture of two isotopes O and O with relative abundances of 90% and 10% respectively. The relative atomic mass of oxygen is?
Answer Details
The relative atomic mass of oxygen is the weighted average of the masses of its isotopes, taking into account their relative abundances.
So, if oxygen has two isotopes, O and O, with relative abundances of 90% and 10% respectively, we can calculate its relative atomic mass as follows:
Relative Atomic Mass = (mass of O x relative abundance of O) + (mass of O x relative abundance of O)
We can find the masses of each isotope of oxygen in the periodic table. O has a mass of 16 atomic mass units (amu), while O has a mass of 18 amu.
Substituting the values into the equation, we get:
Relative Atomic Mass of oxygen = (16 amu x 90%) + (18 amu x 10%)
= (14.4 amu) + (1.8 amu)
= 16.2 amu
Therefore, the relative atomic mass of oxygen is 16.2 amu. is the correct answer.
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