Question

help as soon as possible​

Answer 1

Heya,

Here is the answer:-

Average atomic mass of bromine

= (79×49.7%) +(81×50.3%)

=79×49.7/100 + 81×50.3/100

=79×0.497+81×0.503

=39.263+40.743

=80.006u

hope it helps u..

Answer 2

$\huge\boxed{\fcolorbox{cyan}{orange}{Good night}}$