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Questions

Explanations

16 Which sample of gas at STP has the same number of molecules as 6 liters of Cl₂(g) at STP?

(1) 3 liters of O₂(g)           (3) 3 moles of O₂(g)

(2) 6 liters of N₂(g)           (4) 6 moles of N₂(g)

17 A chemical reaction is most likely to occur when the colliding particles have the proper

(1) energy and orientation

(2) solubility and density

(3) ionic radii and mass

(4) atomic radii and volume

18 The energy absorbed and the energy released during a chemical reaction are best represented by a

(1) cooling curve

(2) heating curve

(3) kinetic energy diagram

(4) potential energy diagram

19 A catalyst increases the rate of a chemical reaction by

(1) providing an alternate reaction pathway

(2) providing the required heat of reaction

(3) increasing the potential energy of the products

(4) increasing the activation energy of the reaction

providing an alternate reaction pathway

20 Which formula represents an alkyne?

(1) C_nH_n                (3) CnH_2n+2

(2) C_2nH_n               (4) CnH_2n–2

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