Question

For the following word equations:

Write formula equations (symbol, charge, cross-over) using your periodic table and reference sheet.
Use state symbols (s, l, g, aq).
Balance the following formula equations:

1. _____ H2 + _____ O2 → _____ H2O
2. _____ N2 + _____ H2 → _____ NH3
3. _____ S8 + _____ O2 → _____ SO3
4. _____ HgO → _____ Hg + _____ O2
5. _____ Zn + _____ HCl → _____ ZnCl2 + _____ H2
6. ___ Na + _____ H2O → _____ NaOH + _____ H2
7. _____ N2 + _____ O2 → _____ N2O
8. _____ Fe + _____ O2 → _____ Fe2O3
9. _____ Fe2(SO4)3 + _____ KOH → _____ K2SO4 + _____ Fe(OH)3

Please balance these formula equations, and make sure to include the correct coefficients for each compound to balance the equations.

Answer 1

Chemical equations have been balanced by adding appropriate coefficients to ensure that the number of atoms for each element is the same on both sides of the equation, reflecting the conservation of mass.

Step-by-step explanation:

Let's go through the given chemical equations and balance them:

1. 2 H2(g) + O2(g) → 2 H2O(l)
2. N2(g) + 3 H2(g) → 2 NH3(g)
3. S8(s) + 12 O2(g) → 8 SO3(g)
4. 2 HgO(s) → 2 Hg(l) + O2(g)
5. Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
6. 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)
7. N2(g) + O2(g) → 2 N2O(g)
8. 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)
9. Fe2(SO4)3(aq) + 6 KOH (aq) → 3 K2SO4(aq) + 2 Fe(OH)3(s)

Note that we've added coefficients to balance the equations, which represent the number of moles of each substance involved in the reaction.