Question

Calculate the

average atomic
mass for this
element.
Isotope -
Percent
Mass Abundance
X-84
0.56
X-86
9.86
X-87
7.00
X-88
82.58
[?] amu
Enter your rounded answer to the hundredths place.
Enter

Answer 1

87.71

Explanation: acellus

Answer 2

88 AMU

Step-by-step explanation:

Average AMU = (84 x 0.0056) + (86 x 0.0986) + (87 x 0.0700) + (88 x 0.8258)

= 0.4704 + 8.4796 + 6.09 + 72. 64

= 87.68 AMU

= 88 AMU (sig figs)