Question

Questão 2 na foto, favor explicar

Answer 1

2) a)    1,0 g ----------> 8.10^-5 g
          100 g---------> x %
          1,0x = 8.10^-5x100
           1,0x = 0,008
             x= 0,008/1,0
             x =0,008%

b) 1 g -----------> 8.10^-5 g
    10^6------> ppm

ppm = 8.10^-5 x 10^6
ppm= 80 ppm

c) 1 g ---------------> 8.10^-5 g
    10^9-------------> ppb

ppb = 10^9  x 8.10^-5
ppb= 80000 ppb