《2025年思维新观察九年级化学全一册人教版》

(1)1$Fe_{2}O_{3}+$3$H_{2}SO_{4}= $1$Fe_{2}(SO_{4})_{3}+$3$H_{2}O$
(2)1$Fe_{2}O_{3}+$3$CO\xrightarrow{高温}$2$Fe+$3$CO_{2}$
(3)1$Ca(OH)_{2}+$1$Na_{2}CO_{3}= $1$CaCO_{3}\downarrow +$2$NaOH$
(4)1$Fe_{3}O_{4}+$4$H_{2}\xrightarrow{高温}$3$Fe+$4$H_{2}O$

答案：
(1)1 3 1 3
(2)1 3 2 3
(3)1 1 1 2
(4)1 4 3 4

(1)2$CO+$1$O_{2}\xrightarrow{点燃}$2$CO_{2}$
(2)1$C_{2}H_{4}+$3$O_{2}\xrightarrow{点燃}$2$CO_{2}+$2$H_{2}O$

答案：
(1)2 1 2
(2)1 3 2 2

(1)2$Mg+$1$O_{2}\xrightarrow{点燃}$2$MgO$ (2)2$KClO_{3}\xlongequal[\triangle]{MnO_{2}}$2$KCl+$3$O_{2}\uparrow$
(3)8$Al+$3$Fe_{3}O_{4}\xrightarrow{高温}$9$Fe+$4$Al_{2}O_{3}$ (4)4$Al+$3$O_{2}= $2$Al_{2}O_{3}$

答案：
(1)2 1 2
(2)2 2 3
(3)8 3 9 4
(4)4 3 2

(1)1$C_{2}H_{5}OH+$3$O_{2}\xrightarrow{点燃}$2$CO_{2}+$3$H_{2}O$ (2)2$C_{6}H_{6}+$15$O_{2}\xrightarrow{点燃}$12$CO_{2}+$6$H_{2}O$

答案：
(1)1 3 2 3
(2)2 15 12 6