Respuesta :
Answer:
24.309 g/mol
Explanation:
To get the atomic mass, all we have to do is calculate with the masses of the three isotope, the real quantity present, taking account of the percent and then, do a sum of these three values. Like a pondered media.
For the first isotope:
23.99 * (78.99/100) = 18.95 g/mol
For the second isotope:
24.99 * (10/100) = 2.499 g/mol
For the last isotope:
25.98 * (11.01/100) = 2.86 g/mol
Now, let's sum all three together
AW = 18.95 + 2.499 + 2.86
AW = 24.309 g/mol
Answer:
Relative atomic mass of magnesium is 24.3
Explanation:
The relative atomic mass (R. A. M) of an element which exhibits isotopy is the average mass of its various isotopes as they occur naturally in any quantity of the element.
To calculate the relative atomic mass, multiply the percentage value of each with its corresponding mass and add the values together.
R. A. M = ( 78.99/100 * 23.99) + (10/100 * 24.99) + (11.01/100 * 25.98)
R. A. M = 18.949701 + 2.499 + 2.860398
R. A. M = 24.30099
R. A. M = ~ 24.3
