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Questions

Explanations

Which mass of oxygen completely reacts with 4.0 grams of hydrogen to produce 36.0 grams of water?

(1) 8.0 g      (3) 32.0 g

(2) 16.0 g    (4) 40.0 g

(1) 29 g/mol (3) 57 g/mol

(2) 54 g/mol (4) 74 g/mol

Which statement describes the energy changes that occur in this reaction?

(1) Energy is absorbed as bonds are formed, only.

(2) Energy is released as bonds are broken, only.

(3) Energy is absorbed as bonds are formed, and energy is released as bonds are broken.

(4) Energy is absorbed as bonds are broken, and energy is released as bonds are formed.

forming bonds releases

(1) AlPO₄ (3) Ca(OH)₂

(2) Li₂SO₄ (4) AgC₂H₃O₂

2.5 x 10⁷ J

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 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85