Title: Balancing chemical equations
Course: Chemistry Revision

Q: Fill in the gaps below using the correct coefficients.

[...] Zn(s) + [...]  S(s) → [...] ZnS(s)
A: 1; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...] Fe_(s) + [...] S_(s) → [...] FeS_(s)
A: 1; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...] Zn_(s) + [...]   H2O(_g) → [...]   ZnO_(s) + [...]   H2_(g)
A: 1; 1; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...] Mg_(s) + [...] H2O_(g)_ → [...] MgO_(s)_ + [...] H2_(g)
A: 1; 1; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...] Mg_(s) + [...] HNO_3(aq) → [...] Mg(NO_3)_2(aq) + [...]H2_(g)
A: 1; 2; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...]Al(s) + [...]H_2SO_4(aq) → [...]Al_2(SO_4)_3(aq) + [...]H_2(g)
A: 2; 3; 1; 3

Q: Fill in the gaps below using the correct coefficients.

[...]Ca_(s) + [...]HCl_(aq) → [...]CaCl_2(aq) + [...] H2_(g)
A: 1; 2; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...]Li_(s) + [...]H_2O_(l) → [...]LiOH_(aq) + [...]H_2(g)
A: 2; 2; 2; 1

Q: Fill in the gaps below using the correct coefficients.

[...] N_2(g) + [...]H_2(g) → [...] NH_3(g)
A: 1; 3; 2

Q: Fill in the gaps below using the correct coefficients.

[...] KClO_3(aq) → [...] KCl_(aq) + [[...] O_2(g)
A: 2; 2; 3

Q: Fill in the gaps below using the correct coefficients.

[...]NaCl_(aq) + [...]F_2(g) → [...]NaF_(aq) + [...]Cl_2(g)
A: 2; 1; 2; 1

Q: Fill in the gaps below using the correct coefficients.

[...] H2(g) + [...]O_2(g) → [...]H_2O_(l)
A: 2; 1; 2

Q: Fill in the gaps below using the correct coefficients.

[...] Pb(OH)_2(aq) + [...] HCl_(aq) → [...]H_2O_(l) + [...] PbCl_2(aq)
A: 1; 2; 2; 1

Q: Fill in the gaps below using the correct coefficients.

[...] P_(s)+ [...] O_2(g) → [...] P_2O_5(s)
A: 4; 5; 2

Q: Fill in the gaps below using the correct coefficients.

[...]Na_(s) + [...]H_2O_(l) → [...]NaOH_(aq) + [...]H_2(g)
A: 2; 2; 2; 2

Q: Fill in the gaps below using the correct coefficients.

[...]HCl_(aq) + [...]CaCO_3(aq) → [...]CaCl_2(aq) + [...]H_2O_(l) + [...]CO_2(g)
A: 2; 1; 1; 1; 1

Q: Fill in the gaps below using the correct coefficients.

[...]NaBr_(aq)  + [...]CaF_2(aq) → [...]NaF_(aq) + [...]CaBr_2(aq)
A: 2; 1; 2; 1

Q: Fill in the gaps below using the correct coefficients.

[...]CH_4(g) + [...] O_2(g) → [...] CO_2(g) + [...]H_2O_(l)
A: 1; 2; 1; 2

Q: Fill in the gaps below using the correct coefficients.

[...]Ag_2O_(s) → [...]Ag_(s) + [...] O_2(g)
A: 2; 4; 1

Q: Fill in the gaps below using the correct coefficients.

[...]Cu_2O + [...]C → [...]Cu + [...]CO_2
A: 2; 1; 4; 1

Q: Fill in the gaps below using the correct coefficients.

[...] Cl_2 + [...] KI → [...] KCl +[...]  I_2
A: 1; 2; 2; 1

Q: Fill in the gaps below using the correct coefficients.

[...]Na + [...]O_2 → [...] Na_2O
A: 4; 1; 2

Q: Fill in the gaps below using the correct coefficients.

[...]Na + [...]HCl → [...]H_2 + [...]NaCl
A: 2; 2; 1; 2

Q: Fill in the gaps below using the correct coefficients.

[...]Mg + [...]HCl → [...] MgCl_2 + [...]H_2
A: 1; 2; 1; 1