Chemical Reactions Quiz

Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown by the balanced chemical equation. AgNO3 → AgCl + NaNO3 What happens to the total mass as the reaction takes place?

• The mass increases.

• The mass decreases.

• The mass first decreases and then increases.

• The mass remains constant.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Students mixed two liquids in a beaker and listed their observations. Based on these observations, which statement contains the best evidence that a chemical reaction occurred?

• There is a change in shape.

• There is a change in volume.

• The two liquids form a new substance.

• The two liquids mix into a solution.

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NGSS.MS-PS1-2

Which information could a student determine from only the chemical formula of a protein?

• A. The physical arrangement of atoms in the structure of the protein

  
  

• B. The number of atoms of each element in the protein

• C. The color of the protein

• D. The number of molecules in each sequence that makes up a protein

Tags

NGSS.MS-PS1-1

Oxygen and oxygen-containing compounds are involved in many different reactions. Which balanced equation represents a reaction that involves 14 atoms of oxygen?

• NH₄Cl + KOH → NH₃ + H₂O + KCl

• 2Na + 2H₂O → 2NaOH + H₂

• 2C₆H₆ + 7O₂ → 4CO₂ + 6H₂O

• 4Fe + 3O₂ → 2Fe₂O₃

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NGSS.MS-PS1-1

NGSS.MS-PS1-5

Barium sulfate (BaSO₄) is a white crystalline solid that is insoluble in water. It is used by doctors to diagnose problems with the digestive system. Barium hydroxide, Ba(OH)₂, is also a white crystalline solid and is used in wastewater treatment. How many more oxygen atoms are represented in the formula for barium sulfate than in the formula for barium hydroxide?

Tags

NGSS.MS-PS1-1

Which statement describes an action that most likely resulted in a chemical reaction?

• A. A pan of water was heated on a stove, and steam formed.

  
  

• B. A liquid was mixed with another liquid, and a precipitate formed.

• C. A liquid was sprayed into the air, and a sweet order was smelled.

• D. A child blew through a wand filled with soap, and bubbles were   

      produced. 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist spilled a few drops of diluted hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3)  onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?

• F. The baking soda and hydrochloric acid combined, and bubbles formed.

  .

  
  

• G. The baking soda absorbed the hydrochloric acid.

• H. Some of the baking soda dissolved in the hydrochloric acid

• J. The hydrochloric acid evaporated, leaving only the baking soda.

Tags

NGSS.MS-PS1-2