June 2023 Chemistry Regents #11-15

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-54 Questions 55-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-69 Questions 70-73 Questions 74-78 Questions 79-81 Questions 82-85

   

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11.

Which change in both charge and radius occurs when an atom loses an electron?

            1. A negative ion is formed with a smaller radius than the atom.

            2. A negative ion is formed with a larger radius than the atom.

            3. A positive ion is formed with a smaller radius than the atom.

            4. A positive ion is formed with a larger radius than the atom.

 

 3   losing a negative electron mates the ion positive

losing outer particles makes it smaller
12. Which statement describes what occurs when two iodine atoms react to produce an iodine molecule?

            1. A bond forms and energy is absorbed.

            2. A bond forms and energy is released.

            3. A bond breaks and energy is absorbed.

            4. A bond breaks and energy is released.

 2   when 2 atoms bond the energy decreases and energy must be released
13. Which process can be used to separate a mixture of two liquids having different boiling points?

            1. deposition

            2. distillation

            3. filtration

            4. sublimation

 2   separation by boiling point is distillation

 

14. Which statement describes a solution of sodium chloride in water?

            1. The mixture is heterogeneous, the solute is NaCl and the solvent is H2O.

            2. The mixture is heterogeneous, the solute is H2O and the solvent is NaCl.

            3. The mixture is homogeneous, the solute is NaCl and the solvent is H2O.

            4. The mixture is homogeneous, the solute is H2O and the solvent is NaCl.

 3   solution -homogeneous mixture

solute-what is dissolved

solvent- what does the dissolving
15. At STP, which property would be the same for 1.0 liter of helium and 1.0 liter of argon?

            1. boiling point

2. density

            3. mass

            4. number of atoms

 4   Avogadro's hypothesis-same temperature and pressure, equal volumes have the same number of particles

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-52 Questions 53-54 Questions 55-57 Questions 58-60 Questions 61-63 Questions 64-65 Questions 66-69 Questions 70-73 Questions 74-78 Questions 79-81 Questions 82-85

   

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