Question

Answer 1

\(a,4K+O_2\rightarrow2K_2O\)

\(b,2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

\(c,Fe_3O_4+4H_2\rightarrow3Fe+4H_2O\)

\(d,2HCl+Mg\left(OH\right)_2\rightarrow MgCl_2+2H_2O\)

Answer 2

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

b) \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+2H_2\)

c) \(Fe_3O_4+4H_2\underrightarrow{t^o}3Fe+4H_2O\)

d) \(2HCl+Mg\left(OH\right)_2\rightarrow MgCl_2+2H_2O\)