Unit 11 CCR Chemistry Test Review

Sodium bicarbonate (baking soda) and vinegar react to form carbon dioxide. Which set of reactants will form carbon dioxide at the fastest rate?

• powdered baking soda and 2% vinegar

• powdered baking soda and 5% vinegar

• a chunk of baking soda and 2% vinegar

• a chunk of baking soda and 5% vinegar

Tags

NGSS.HS-PS1-5

How does a catalyst affect the rate of a reaction?

• The catalyst increases the rate

• The catalyst decreases the rate

• The catalyst doesn't affect the rate of a reaction

• It depends on the identity of the catalyst

Tags

NGSS.HS-PS1-5

How does the catalyst affect the activation energy (Ea) for a chemical reaction?

• The catalyst increases the activation energy

• The catalyst decreases the activation energy

• The catalyst doesn't affect the activation energy

Tags

NGSS.HS-PS1-4

Keeping milk in the frig delays spoiling. Why does this happen?

• The molecules move faster and collide more often

• The molecules move faster and collide less often

• The molecules move slower and collide more often

• The molecules move slower and collide less often

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

True or False? The rate of a reaction remains steady from start to finish.

• True

• False

Tags

NGSS.HS-PS1-5

Consider the reaction N2 + O2  -->  2 NO.  The NO gas is a:

• reactant

• product

• catalyst

Consider the reaction N2 + O2  -->  2 NO. If the rate of the reaction for N2 is 0.02 M/min, the rate for the NO will be:

• 0.01 M/min

• 0.02 M/min

• 0.04 M/min

• There is no way to tell from the information provided

Tags

NGSS.HS-PS1-5

Consider the reaction 2 N2 + 5 O2 --> 2 N2O5. Which substances will have the same rate of reaction?

• N2 and O2

• O2 and N2O5

• N2 and N2O5

• They will all have different rates of reaction

Tags

NGSS.HS-PS1-5

What is the energy of activation for this reaction?

• 80 kJ

• 100 kJ

• 120 kJ

• 160 kJ

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-4

What is the energy of the activated complex for this reaction?

• 80 kJ

• 160 kJ

• 120 kJ

• 240 kJ

Tags

NGSS.HS-PS1-4