3. Chemical Reactions

Which of the following is the correctly balanced chemical equation for the reaction: K2CrO4 + Na2SO3 + HCl → KCl + Na2SO4 + CrCl3 + H2O?

What is the sum of the coefficients in the balanced equation for the reaction of Mn^{2+} with NaOH to form Mn(OH)_2?

Consider the chemical equation: 2 H2 + O2 → 2 H2O. How many different elements are present in this chemical equation?

Which of the following is the correctly balanced equation for the reaction between phosphoric acid (H3PO4) and strontium hydroxide (Sr(OH)2)?

Which of the following represents the correct products of the reaction: Pb(NO3)2 (aq) + 2 KCl (aq) → ?

Which of the following is the correctly balanced chemical equation for the reaction between sodium sulfate and barium chloride to form barium sulfate and sodium chloride?

Which of the following lists the reactants in the chemical equation: HCl(aq) + NaHCO_3(aq) → CO_2(g) + H_2O(l) + NaCl(aq)?

Which statement is true for balanced chemical equations?

In the chemical reaction 2H₂ + O₂ → 2H₂O, what are the products?

Which of the following statements correctly describes the chemical equation: 2KClO_3(s) → 2KCl(s) + 3O_2(g)?

Which set of coefficients correctly balances the chemical equation: Mg + O_2 → MgO?

In the chemical equation 2H₂ + O₂ → 2H₂O, what are the reactants?

Given the following intermediate chemical equations:1) C_2H_6 + O_2 → CO_2 + H_2O2) 2C_2H_6 + 7O_2 → 4CO_2 + 6H_2OWhich of the following is the correctly balanced final chemical equation for the complete combustion of ethane (C_2H_6)?

What is the primary purpose of adding a coefficient to a chemical equation?

Which of the following chemical equations is balanced?