Chemistry: Final Exam Review questions and answers 100% verified.

Chemistry: Final Exam Review questions and answers 100% verified. How many valence electrons are in an atom of chlorine? - correct answers.7 How many valence electrons does aluminum have? - correct answers.3 Define Reaction Rate - correct answers.The decrease in concentration of reactants or the increase in concentration of products with time. How does increasing temperature affect the rate of reaction? - correct answers.Increasing temperature causes the kinetic energy to increase. Thus, molecules are moving faster and colliding more frequently. This causes the rate of reaction to incrase. If I decrease the concentration of reactant, what happens to the rate of reaction? - correct answers.Decreasing concentration leads to less reactants available for collision. Therefore, reaction rate decreases. How does surface area influence reaction rate? - correct answers.By increasing the surface area of reactant molecules, we are increasing the space or point of contact that these molecules have available to interact. This causes an increase in the rate of reaction. How does a catalyst speed up a chemical reaction? - correct answers.A catalyst speeds up a chemical reaction by finding an alternate pathway with a lower activation energy. Define activation energy. - correct answers.The energy required to start a chemical reaction. Define equilibrium. - correct answers.Equilibrium is established when the rate of the forward reaction is equal to the rate of the reverse reaction. Is energy absorbed or released in an endothermic reaction? - correct answers.Absorbed. What is the sign of delta H for an exothermic reaction? - correct answers.Exothermic reactions release energy. The sign of delta H is negative. When you touch a flask and it feels hot, is this an endothermic or exothermic process? - correct answers.Exothermic; heat is being given off. Define specific heat capacity. - correct answers.The amount of heat required to raise 1g of a substance to 1 degrees Celsius. q=mc(delta)T ; What does "q" stand for? - correct answers.Heat (kJ) q=mc(delta)T ; What does "c" stand for? - correct answers.Specific heat capacity (J / g degrees C) What is a hydrogen ion donor called? - correct answers.An acid. What is a hydrogen ion acceptor called? - correct answers.A base. Feels slippery; acid or base? - correct answers.Base. Tastes sour; acid or base? - correct answers.Acid. Tastes bitter; acid or base? - correct answers.Base. pH 7 ; acid, base, or neutral? - correct answers.Acid pH 7 ; acid, base, or neutral? - correct answers.Base Define neutralization. - correct answers.When an acid reacts with a base to form water and a salt. pH = 7. Soap; acid or base? - correct answers.Base (tastes bitter) Ammonia, acid or base? - correct answers.Base (drain cleaners are bases). Lemonade; acid or base? - correct answers.Acid (tastes sour) Define solute. - correct answers.The part of the solution in less amount. Define solvent. - correct answers.The part of the solution in greater amount. (HINT: solvent is a bigger word than solute) How many atoms are in 1 mole? - correct answers.1 mole = 6.02 x 10^23 atoms/molecules What is the volume occupied by 1 mole of a gas at STP? - correct answers.1 mole of gas at STP = 22.4 L