Chemistry Exam #3 (CH. 3,4)

Write a balanced equation for the combustion of gaseous butane (C4H10 ), a fuel used in portable stoves and grills, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

C4H10(g) + O2(g) → CO2(g) + H2O(g) 1C4H10(g) + O2(g) → 4CO2(g) + H2O(g) 1C4H10(g) + O2(g) → 4CO2(g) + 5H2O(g) 1C4H10(g) + 6.5O2(g) → 4CO2(g) + 5H2O(g) FINAL ANSWER 2C4H10(g) + 13O2(g) → 8CO2(g) + 10H2O(g)

Balance the equation CH4 + O2 → CO2 + H2O

CH4 (g) + O2 (g) → CO2 (g) + 2H2O (g)

Write a balanced equation for the reaction between solid cobalt(III) oxide and solid carbon to produce solid cobalt and carbon dioxide gas.

Co2O3(s) + C(s) → Co(s) + CO2(g) 2Co2O3(s) + C(s) → Co(s) + 3CO2(g) 2Co2O3(s) + 3C(s) → Co(s) + 3CO2(g) FINAL ANSWER 2Co2O3(s) + 3C(s) → 4Co(s) + 3CO2(g)

When a chemical equation is not balanced what rule does it break?

It violates the conservation of matter.

Write a balanced equation for the reaction between aqueous strontium chloride and aqueous lithium phosphate to form aqueous lithium chloride and solid strontium phosphate Consider charges when writing formulas.

SrCl2(aq) + Li3PO4(aq) → LiCl(aq) + Sr3(PO4 )2(s) 3SrCl2(aq) + Li3PO4(aq) → LiCl(aq) + 1Sr3 (PO4 )2 (s) 3SrCl2(aq) +2Li3PO4(aq) → LiCl(aq) + 1Sr3 (PO4 )2(s) FINAL ANSWER 3SrCl2(aq) +2Li3PO4(aq) → 6LiCl(aq) + 1Sr3 (PO4 )2(s)

Reactant vs. Solvent

Substances to the left of the arrow are the reactants substances to the right of the arrow are products.