Unit 4 AP Chemistry

How many moles of CO₂ is produced when 3 moles of H₂O is also produced?

• 2

• 3

• 4

• 4.5

Tags

NGSS.HS-PS1-7

Which is the correct net ionic equation for the reaction of AgNO₃ and CaCl₂?

• Ca²⁺(aq) +  2Cl^- (aq) → CaCl(s)

• Ag⁺(aq)  +  Cl^- (aq) → AgCl(s)

• Ag +  Cl  →  AgCl

• Ag⁺  +  Ca²⁺   →Ag₂Ca (s)

Tags

NGSS.HS-PS1-7

What are the spectator ions in the reaction of sodium chloride with silver nitrate?

• silver and nitrate

• sodium and chloride

• sodium and nitrate

• silver and chloride

Usuing Graham's Law: If you had 2 identical balloons filled with Nitrogen gas (N₂) and Helium gas (He), which balloon will deflate the fastest?

• Helium balloon

• nitrogen balloon

• they will both deflate at the same rate

• the balloons will both pop

Which of the following best describes a chemical reaction?

• A process where substances are mixed but retain their individual properties.

• A process where substances undergo a chemical change to form new substances.

• A process where substances change their state of matter without changing their chemical identity.

• A process where substances are separated based on physical properties.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the purpose of a titration in chemistry?

• To measure the temperature of a solution.

• To determine the concentration of a solute in a solution.

• To separate mixtures based on boiling points.

• To identify the color of a solution.

Which of the following statements is true about chemical changes?

• They only involve changes in the physical state of a substance.

• They result in the formation of new substances with different properties.

• They are always reversible.

• They do not involve energy changes.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a balanced chemical equation?

Tags

NGSS.HS-PS1-7

• 1:1

• 2:1

• 1:2

• 2:2

Tags

NGSS.HS-PS1-7

Which of the following is a type of chemical reaction where two or more substances combine to form a single product?

• Decomposition reaction

• Single replacement reaction

• Synthesis reaction

• Combustion reaction