use the above data table of isotope masses and percent abundances to calculate the average atomic mass of…

use the above data table of isotope masses and percent abundances to calculate the average atomic mass of oxygen.

use the above data table of isotope masses and percent abundances to calculate the average atomic mass of oxygen.

Answer

Explanation:

Step1: Convert percentages to decimals

$99.76%=0.9976$, $0.0381% = 0.000381$, $0.205%=0.00205$

Step2: Multiply each isotope mass by its abundance

For isotope with mass 16 amu: $16\times0.9976 = 15.9616$ For isotope with mass 17 amu: $17\times0.000381= 0.006477$ For isotope with mass 18 amu: $18\times0.00205 = 0.0369$

Step3: Sum the results

$15.9616+0.006477 + 0.0369=16.004977\approx16.005$ amu

Answer:

$16.005$ amu