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Questions

Explanations

11 Given the equation representing a reaction:

O + O → O₂

Which statement describes the changes that occur as the oxygen molecule is produced?

(1) Energy is absorbed as bonds are broken.

(2) Energy is absorbed as bonds are formed.

(3) Energy is released as bonds are broken.

(4) Energy is released as bonds are formed.

12 Which term represents the strength of the attraction an atom has for the electrons in a chemical bond?

(1) electrical conductivity

(2) electronegativity

(3) first ionization energy

(4) specific heat capacity

13 Compared to a 15-gram sample of Cu(s) at 25°C, a 25-gram sample of Cu(s) at 25°C has

(1) the same density and the same chemical properties

(2) the same density and different chemical properties

(3) a different density and the same chemical properties

(4) a different density and different chemical properties

both intrinsic properties

14 Which substance can not be broken down by a chemical change?

(1) ammonia       (3) tungsten

(2) ethanol          (4) water

15 The kinetic molecular theory states that all particles of an ideal gas are

(1) colliding without transferring energy

(2) in random, constant, straight-line motion

(3) arranged in a regular geometric pattern

(4) separated by small distances relative to their size

ideal gas rules

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 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85