Question

aranjati on ordine crescatoare a procentului de C urmatorii compusi: CO2, CH4, H2CO3, CaCO3

Answer 1

se calculeaza procentul de carbon din fiecare compus

CO2

MCO2=12+32=44-----> 1mol=44g

44g CO2-------12gC

100g---------------x

x=100.12: 44=27,27% C

CH4

MCH4=12+4=16----->1mol=16g

16g CO2--------12 g C

100g--------------y

y=100.12:16=75 % C

H2CO3

M=2+12+48=62----->1mol=62g

62g H2CO3----------12 g C

100g------------------------z

z= 100.12:62=19,35 % C

CaCO3

M=40+12+40=100----->1mol=100g

1oog CaCo3---------12g C

100 g---------------------w

w=100.12 : 100=12% C

75%  ; 27,27% ; 19,35% ; 12%

CH4 ; CO2 ;H2CO3 ;CaCO3