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how do you balance and what are the answers

46. Balance these equations:
(a) ____Fe(s) + ____O2(g)h____ Fe2O3(s)
(b) ____H2(g) + ____N2(g)h____NH3(g)
(c) ____Cl2(g) + ____KBr(aq)h____Br2(l ) +
____KCl (aq)
(d) ____CH4(g) + ____O2(g)h____CO2(g) +
____H2O(l )
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1 Answer

Ensure number of atoms of each element are equal on both sides of chemical equation. Keep in mind valency of each element.
 
(a) 2Fe2 + 3O2 -> 2Fe2O3
 
(b) 3H2 + N2 -> 2NH3
 
(c) Cl2 + 2KBr -> 2KCl + Br2
 
(d) CH4 + 2O2 -> CO2 + 2H2O
 
:)