n = V/24,79
A=n×6,022.10²³
n=m/M
a. 
nO2=2,479/24,79=0,1mol
A = 0,1×6,022×10²³=6,022.10²²
mO2=0,1×16×2=3,2g
b.
nO2=16/32=0,5mol
A=0,5×6,022.10²³=3,011.10²³
V O2=0,5×24,79=12,395lit
c.
nSO2=7,437/24,79=0,3mol
mSO2=0,3×(32+16×2)=19,2g

n = V/24,79 A=n×6,022.10²³ n=m/M a.  nO2=2,479/24,79=0,1mol A = 0,1×6,022×10²³=6,022.10²² mO2=0,1×16×2=3,2g b. nO2=16/32=0,5mol A=0,5×6,022.10²³=3,011.10²³ V O2=0,5×24,79=12,395lit

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