Question

cum pot sa aflu numarul de moli existenti in 4gco2

Answer 1

Folosind formula n=m/M din care n=nr de moli m=masa in grame M=masa moleculara a substantei n=4/116 n=0,034 moli

Answer 2

Masa moleculara a CO2=Masa atomica C+2xM atomica O
M=12+36=48u,a.m
1 mol de CO2  se afla 48g CO2
xmoli se afla in  4 grame 
1/x=48/4
x=4/48
x=1/12 moli