3. Chemical Reactions

Which of the following best describes a balanced chemical equation?

Consider the unbalanced chemical equation: C_2H_5OH + O_2 → CO_2 + H_2O. What is the total number of oxygen atoms present on the left-hand side of this equation?

Consider the balanced equation below: 2 Fe + 3 Cl_2 → 2 FeCl_3 What is the mole ratio of Cl_2 to Fe?

Which of the following best describes the reaction: 2 H_2S(g) + 3 O_2(g) → 2 H_2O(g) + 2 SO_2(g)?

Which condition must be met in order for a chemical equation to be considered balanced?

Why must chemical equations be balanced?

When balancing the following chemical equation, are the charges balanced? Fe^{2+} + MnO_4^- ightarrow Fe^{3+} + Mn^{2+}

What is the final step in the scientific method?

Which of the following is the correctly balanced chemical equation for the reaction between NaBr and H3PO4 to form Na3PO4 and HBr?

Which of the following statements correctly describes the balanced chemical equation 2H_2 + O_2 → 2H_2O?

Which of the following is the correctly balanced chemical equation for the reaction between hydrogen sulfide and oxygen among volcanic gases to produce sulfur dioxide and water?

During combustion, methane yields carbon dioxide and water. The unbalanced equation for this reaction is: CH4(g) + O2(g) → CO2(g) + H2O(l). What will the mole ratios for the balanced equation be? (What coefficients are needed in order to balance this equation?)

What is the balanced chemical equation for the reaction between iron(III) chloride (FeCl3) and sodium hydroxide (NaOH)?

Which of the following is the balanced chemical equation for the reaction of solid strontium with iodine gas?

Which of the following is the correctly balanced form of the chemical equation: Fe + O2 → Fe2O3?