Air Bags and Stoichiometry

What type of reaction occurs initially with sodium azide when airbags initially deploy?

• Combustion reaction

• Decomposition reaction

• Synthesis reaction

• Single displacement reaction

What would happen if the manufacturers did not start with the correct amount of sodium azide?

• The product would be ineffective.

• The product would be too strong.

• The product would be unstable.

• All of the above.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Based on the article, stoichiometry is important for airbag safety because:

• it ensures the correct amount of gas is produced to inflate the airbag.

• it determines the color of the airbag.

• it affects the weight of the airbag.

• it controls the temperature of the airbag.

Potassium nitrate is used in airbags because it:

• acts as a propellant to inflate the airbag

• serves as a coolant

• provides structural support

• reacts with the dangerous byproduct of the generation of nitrogen gas by sodium azide

Write the balanced equation for the reaction between potassium nitrate and sodium below.

• KNO₃ + Na → NaNO₃ + K

• KNO₃ + Na → KNO₂ + Na₂O

• KNO₃ + Na → K₂O + NaNO₂

• KNO₃ + Na → K₂O₃ + Na₂O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the primary use of silicon dioxide?

• It is used in the production of glass and ceramics.

• It is a type of metal used in construction.

• It is a gas used in refrigeration.

• It is a liquid used in cleaning products.

Which of the following is the balanced equation for the reaction between potassium nitrate and sodium?

• KNO₃(s) + Na(s) ⎯→

  K₂O(s) + Na₂O(s) + N₂(g)

• 2KNO₃(s) + 2Na(s) ⎯→

  K₂O(s) + Na₂O(s) + N₂(g)

• 2KNO₃(s) + 10Na(s) ⎯→

  K₂O(s) + 5Na₂O(s) + N₂(g)

• 4KNO₃(s) + 2Na(s) ⎯→

  2K₂O(s) + Na₂O(s) + 2N₂(g)

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7