a, PT: \(S+O_2\underrightarrow{t^o}SO_2\)
\(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
b, Ta có: \(n_{SO_2}=\dfrac{2,479}{24,79}=0,1\left(mol\right)\)
Theo PT: \(n_S=n_{SO_2}=0,1\left(mol\right)\)
⇒ mP = 6,3 - mS = 6,3 - 0,1.32 = 3,1 (g)
\(\Rightarrow n_P=\dfrac{3,1}{31}=0,1\left(mol\right)\)
Theo PT: \(n_{O_2}=n_S+\dfrac{5}{4}n_P=0,225\left(mol\right)\)
\(\Rightarrow V_{O_2}=0,225.24,79=5,57775\left(l\right)\)
c, Theo PT: \(n_{P_2O_5}=\dfrac{1}{2}n_P=0,05\left(mol\right)\)
\(\Rightarrow m_{P_2O_5}=0,05.142=7,1\left(g\right)\)