Question

Answer 1

4Fe+2O2-to>Fe3O4

4K+O2-to>2K2O

2Ca+O2-to>2CaO

4P+5O2-to>2P2O5

C+O2-to>CO2

Answer 2

\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)

\(4K+O_2\rightarrow\left(t^o\right)2K_2O\)

\(2Ca+O_2\rightarrow\left(t^o\right)2CaO\)

\(4P+5O_2\rightarrow\left(t^o\right)2P_2O_5\)

\(C+O_2\rightarrow\left(t^o\right)CO_2\)

Answer 3

3Fe + 2O2--->Fe3O4 

4K + O2 --->2K2O

2Ca + O2--->2CaO 

4P + 5O2--->2P2O5

C+O2--->CO2 

 

Answer 4

\(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(4K+O_2\underrightarrow{t^o}2K_2O\)

\(2Ca+O_2\underrightarrow{t^o}2CaO\)

\(4P+5O_2\underrightarrow{t^o}2P_2O_5\)

\(C+O_2\underrightarrow{t^o}CO_2\)