CO2 are masa molara μ=1molCx12g/mol +2molx16g/mol=>μ= 44g/mol
daca in 44g CO2 sunt 32goxigen
in 100g 100x32/44 ------> c= %oxigen
In acelasi mod calculezi si la H2o
μ=2molHx1g/mol + 1molOx16g/mol =>18g/mol'
18g apa 16g O
100 100X16/18 ------->C= %oxigen.......