làm mk câu a , b thôi nha. Câu c, d ko cần đâu ạ
a) (4x+y)O2 + 2CxHy \(\underrightarrow{to}\) yH2O + 2xCO2
b) CxHyOz + (x+y/4-z/2)O2 \(\underrightarrow{to}\) xCO2 + \(\dfrac{y}{2}\)H2O
c) 2KMnO4 \(\underrightarrow{to}\) K2MnO4 + MnO2 + O2
d) 4Fe(OH)2 + O2 + 2H2O \(\underrightarrow{to}\) 4Fe(OH)3