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Balance the following equations using the method outlined in Section 3.7: (a) C + O CO (b) CO + O CO (c) H + Br HBr (d) K + HO KOH + H (e) Mg + O MgO (f) O O (g) HO HO + O (h) N2 1 H2 ¡ NH3 (i) Zn 1 AgCl ¡ ZnCl2 1 Ag (j) S8 1 O2 ¡ SO2 (k) NaOH 1 H2SO4 ¡ Na2SO4 1 H2O (l) Cl2 1 NaI ¡ NaCl 1 I2 (m) KOH 1 H3PO4 ¡ K3PO4 1 H2O (n) CH4 1 Br2 ¡ CBr4 1 HBr
On what law is stoichiometry based? Why is it essential to use balanced equations in solving stoichiometric problems?
Stoichiometry is an approach to interpret chemical equations quantitatively and studies the reactants and products of chemical reactions. It is based on the law of conservation of mass ensuring that the numbers of atoms (and the masses) of each element remain unchanged in a reaction. Therefore, stoichiometry requires the presence of balanced equations.
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