Question

question 15 (4 points) saved calculate the average atomic mass of imaginary element y. isotope mass abundance y - 145 145.0 amu 48.25% y - 146 146.1 amu 38.65% y - 147 147.2 amu 13.10% upload all of your calculations! do not write anything in this box

Explanation:

Step1: Convert percentages to decimals

$48.25\% = 0.4825$, $38.65\%=0.3865$, $13.10\% = 0.1310$

Step2: Multiply mass by abundance for each isotope

For Y - 145: $145.0\times0.4825 = 69.9625$
For Y - 146: $146.1\times0.3865=56.46765$
For Y - 147: $147.2\times0.1310 = 19.2832$

Step3: Sum the results

$69.9625+56.46765 + 19.2832=145.71335$ amu

Answer:

$145.71$ amu (rounded to two decimal places)