BJU Chemistry Chapter 11 Review

Which of the following is not evidence that a chemical reaction has occurred?

• a. a change in energy

• b. the formation of a precipitate

• c. the use of a catalyst

• d. a change in color

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to the law of conservation of matter, atoms that go into a reaction must

• a. be absorbed.

• b. be created.

• c. come out.

• d. change color.

Tags

NGSS.HS-PS1-7

Which of the following correctly balances the equation NH₃ + O₂ ⟶ H₂O + NO₂?

• a. 2NH₃ + 3O₂ ⟶ 2H₂O + 2NO₂

• b. 2NH₃ + 4O₂ ⟶ 3H₂O + 2NO₂

• c. 4NH₃ + 7O₂ ⟶ 6H₂O + 4NO₂

• d. 3NH₃ + 5O₂ ⟶ 4H₂O + 3NO₂

Tags

NGSS.HS-PS1-7

Which of the following correctly balances the equation Ag + H₂S + O₂ ⟶ Ag₂S + H₂O?

• a. 2Ag + 2H₂S + O₂ ⟶ Ag₂S + 2H₂O

• b. 4Ag + 2H₂S + O₂ ⟶ 2Ag₂S + 2H₂O

• c. 4Ag + 4H₂S + 2O₂ ⟶ 2Ag₂S + 4H₂O

• d. 6Ag + 3H₂S + O₂ ⟶ 3Ag₂S + 3H₂O

Tags

NGSS.HS-PS1-7

(True or False) A liquid that comes out of solution due to a chemical change is called a precipitate.

• True

• False

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

According to the law of conservation of ______, matter cannot be created or destroyed.

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NGSS.HS-PS1-7

The symbol Δ above a yield arrow indicates that a reaction is ______.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The reaction 2AlCl₃ → 2Al + 3Cl₂ is a _______ reaction.

• synthesis

• decomposition

• single-replacement

• double-replacement

The reaction TiCl₄ + 4Na → Ti + 4NaCl is a _______ reaction.

• synthesis

• decomposition

• single-replacement

• double-replacement

Which of the following metals is the most reactive?

• Fe

• Mg

• Cu

• K

Tags

NGSS.HS-PS1-2