the table below gives the data that is needed to calculate the average atomic mass of element b. isotope…

the table below gives the data that is needed to calculate the average atomic mass of element b. isotope atomic mass (amu) relative abundance (%) b - 10 10.01 19.91 b - 11 11.01 80.09 based on these data, what is the average atomic mass of element b? 10.01 10.51 10.81 11.01

the table below gives the data that is needed to calculate the average atomic mass of element b. isotope atomic mass (amu) relative abundance (%) b - 10 10.01 19.91 b - 11 11.01 80.09 based on these data, what is the average atomic mass of element b? 10.01 10.51 10.81 11.01

Answer

Answer:

C. 10.81

Explanation:

Step1: Convert percentages to decimals

$19.91% = 0.1991$, $80.09%=0.8009$

Step2: Calculate weighted - mass of B - 10

$10.01\times0.1991 = 1.992991$

Step3: Calculate weighted - mass of B - 11

$11.01\times0.8009 = 8.817909$

Step4: Calculate average atomic mass

$1.992991 + 8.817909=10.8109\approx10.81$