CHEMISTRY FINAL EXAM AND LAB PRACTICAL REVIEW SPRING QUESTIONS AND CORRECT ANSWERS 2025/2026

CHEMISTRY FINAL EXAM AND LAB PRACTICAL REVIEW SPRING QUESTIONS AND CORRECT ANSWERS 2025/2026 What is 1 mole equal to? - Answer -6.022x10²³ representative particles the amount of grams of a substance in 1 mole - Answer -molar mass N₂ + 3H₂ → 2NH₃ What is the mole ratio between N₂ and 2NH₃? - Answer -1:2 N₂ + 3H₂ → 2NH₃ What is the mole ratio between N₂ and 3H₂? - Answer -1:3 Actual yield - Answer -the amount of product formed when a reaction is carried out in the laboratory Theoretical Yield - Answer -the maximum amount of product that could be formed from given amounts of reactants N₂ + 3H₂ → 2NH₃ - Answer -Synthesis reaction 4CH₃ + 7O₂ → 6H₂O + 4CO₂ - Answer -Combustion reaction HCl + Br₂ → HBr + Cl₂ - Answer -Single Replacement reaction NaOH + HCl → H₂O + NaCl - Answer -Double Replacement reaction2MgO → 2Mg + O₂ - Answer -Decomposition reaction What do the coefficients in a balanced chemical reaction represent? - Answer -Molar quantities of substances in the chemical reaction. They allow for mole-mole ratios What is the pH of a neutral solution - Answer -pH=7 Acids have a pH of _____? - Answer -pH < 7 Bases have a pH of _____? - Answer -pH > 7 In an acidic solution, what is your [H⁺] greater than? - Answer -[H⁺]> 1 x 10⁻⁷ What is pH a measure of? - Answer -The concentration of H⁺ ions in solution What is pOH a measure of? - Answer -The concentration of OH⁻ ions in solution As you increase pH, you ________________ [H⁺] - Answer -decrease In a neutralization reaction, what is always produced? - Answer -A salt and water Kinetic Molecular Theory - Answer -All molecules are in constant motion. If you increase the temperature, molecules gain more energy and move faster. What do all states of matter have in common? - Answer -Their particles are always in motion What is true of only gases, not of solids and liquids? - Answer -They will expand to completely fill their containerDiffuse/mixing - Answer -tendency of particles to move toward areas of lower concentration until the concentration is uniform throughout (equilibrium) reactants - Answer -starting substances in a chemical reaction products - Answer -substances formed in a chemical reaction Law of Conservation of mass - Answer -matt