Question

Calculeaza volumul oxidului de carbon care se formeaza la arderea:
a) a 60 g de funingine;
b) a 60 g de carbune, ce contine 10% de impuritati.

Answer 1

a) 60 g de funingine=60 g C
60g           x
C + O₂ -> CO₂
12g          22,4L
x=(60×22,4)÷12=112L CO₂
b)60g carbune, 10% impuritati=60g C de puritate 90%
$\frac{p}{100} = \frac{mpur}{mimpur}$
$\frac{90}{100} = \frac{mpur}{60}$ => mpur=(60×90)÷100=54g C
54g            x
C + O₂ -> CO₂
12g         22,4L
x=(54×22,4)÷12=100,8L CO₂