In nature, the element boron occurs 19.9% as \[^{\text{10}}\text{B}\] and 80.1% as\[^{\text{11}}\text{B}\]. If the isotopic mass of \[^{\text{10}}\text{B}\] is 10.013 amu and that of \[^{11}\text{B}\] is 11.009 amu, the atomic mass of boron is

In nature, the element boron occurs 19.9% as \[^{\text{10}}\text{B}\]

1.	In nature, the element boron occurs 19.9% as \[^{\text{10}}\text{B}\] and 80.1% as\[^{\text{11}}\text{B}\]. If the isotopic mass of \[^{\text{10}}\text{B}\] is 10.013 amu and that of \[^{11}\text{B}\] is 11.009 amu, the atomic mass of boron is
A.	10
B.	11
C.	10.8
D.	11.8
Answer» D. 11.8

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In nature, the element boron occurs 19.9% as \[^{\text{10}}\text{B}\] and 80.1% as\[^{\text{11}}\text{B}\]. If the isotopic mass of \[^{\text{10}}\text{B}\] is 10.013 amu and that of \[^{11}\text{B}\] is 11.009 amu, the atomic mass of boron is

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