6. During a chemical reaction, energy is either released or absorbed 7. Is the following sentence true or false? Physical and chemical changes can be either exothermic or endothermic changes. 8. What is an exothermic reaction? 9. Is the following sentence true or false? In exothermic reactions, the energy required to break the bonds in the reactants is greater than the energy released as the products form.

Identify the reaction type for the reaction shown below: \( \mathrm{Cr}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}+\mathrm{H}_{2} \) Single Displacement. Precipitation Neutralization Synthesis/Combination Decomposition

Concentrated NaOH is 19.0 M . Determine the volume in mL of the concentrated solutio required to produce 1800 mL of 1.77 M NaOH

Identify the reaction type for the reaction shown below: \( \mathrm{NaHCO}_{3} \rightarrow \mathrm{NaCO}_{3}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2} \)

Identify the reaction type for the reaction shown below: \( \mathrm{Na}+\mathrm{Br}_{2} \rightarrow \mathrm{NaBr} \)

What is the molarity of the solution when 43.30 grams of NaBr is dissolved in 850.0 mL of water?