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Explanations

21  When a chemical reaction is at equilibrium, the concentration of each reactant and the concentration of each product must be

(1) constant

(2) variable

(3) equal

(4) zero

(1) nitrogen 

(2) oxygen   

(3) carbon

(4) sulfur

(1) deposition and saponification

(2) deposition and transmutation

(3) polymerization and saponification

(4) polymerization and transmutation

2Al(s) + 3Cu²⁺(aq) –> 2Al³⁺(aq) + 3Cu(s)

Which particles are transferred in this reaction?

(1) electrons (2) neutrons

(3) positrons (4) protons

(1) at the anode

(2) at the cathode

(3) in the salt bridge

(4) in the wire

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

Question 51-53 Questions 54-56
 Questions 57-61 Questions 62-65 Questions 66-68 Questions 69-72  Questions 73-75  Questions 76-78  Questions 79-82 Questions 83-85