Răspuns:
1.
MCO2=12+2×16=44g/mol
44gCO2.............12gC....................32gO
100gCO2...........xgC......................ygO
x=100×12/44=calculeaza
y=100×32/44=calculeaza
2.
MH2SO4=2×1+32+4×16=98g/mol
98gH2SO4...................2gH.....................32gS.............64gO
100gH2SO4..................xgH.....................ygS..................zgO
x=100×2/98=calculeaza
y=100×32/98=calculeaza
z=100×64/98=calculeaza
Explicație:
