Em tham khảo nha:
\(\begin{array}{l}
a)\\
4P + 5{O_2} \to 2{P_2}{O_5}\\
b)\\
nP:n{O_2} = 4:5\\
c)\\
n{P_2}{O_5} = \dfrac{{56,8}}{{142}} = 0,4\,mol\\
\Rightarrow nP = 0,4 \times 2 = 0,8\,mol\\
m = 31 \times 0,8 = 24,8g\\
C2:\\
n{O_2} = 0,4 \times \dfrac{5}{2} = 1\,mol\\
mP = 56,8 - 1 \times 32 = 24,8g\\
d)\\
Vkk = 5V{O_2} = 5 \times 1 \times 22,4 = 112l\\
e)\\
C{H_4} + 2{O_2} \to C{O_2} + 2{H_2}O\\
nC{H_4} = \dfrac{1}{2} = 0,5\,mol \Rightarrow VC{H_4} = 0,5 \times 22,4 = 11,2l
\end{array}\)
