EDM Chemistry B Semester Review

What is the molecular geometry of a molecule with four bonding pairs and no lone pairs on the central atom?

• Tetrahedral

• Linear

• Trigonal planar

• Bent

In stoichiometry, what is the term used to describe the substance that limits the amount of product formed in a chemical reaction?

• Excess reactant

• Limiting reactant

• Catalyst

• Product

What type of decay process involves the emission of an alpha particle from a nucleus?

• Beta decay

• Gamma decay

• Alpha decay

• Positron emission

Which of the following denotes a strong acid?

• An acid that ionizes completely

• Any acid with a pH lower than 7

• Any substance that produces H+ ions in solution

• Any substance that conducts electricity

What is the molarity of a solution containing 58 grams of NaCl in 2 liters of solution? (Molar mass of NaCl = 58 g/mol)

• 0.25 M

• 0.5 M

• 1 M

• 2 M

What is the molecular geometry of a molecule with two bonding pairs and two lone pairs on the central atom?

• Linear

• Bent

• Tetrahedral

• Trigonal planar

In a balanced chemical equation, what does the principle of conservation of mass state?

• Mass is created during the reaction

• Mass is destroyed during the reaction

• Total mass of reactants equals total mass of products

• Total energy of reactants equals total energy of products

What is the enthalpy change of a reaction that absorbs heat from the surroundings?

• Positive

• Negative

• Zero

• Constant

Which type of nuclear reaction involves combining two light nuclei to form a heavier nucleus?

• Fission

• Fusion

• Alpha decay

• Beta decay

Which of the following is a property of bases?

• They turn red litmus paper blue

• They turn blue litmus paper red

• They are non-corrosive