Which of the following is NOT a factor affecting reaction rate?

• Temperature of the reactants
• Concentration of the reactants
• Presence of a catalyst
• Surface area of the reactants
• Polarity of the reactants

The catalyst alters the rate of a chemical reaction by .......................

• increasing the temperature
• changing the products formed in the direction of the reaction

• providing an alternative pathway with a lower Ea

• increasing the frequencies of collisions between molecules

• providing a surface on which the molecules react

Which of the following are true about reaction rates?

• The overall rate law is determined by the fastest step of a reaction.

• The presence of a catalyst will increase the number of molecules entering the transition state.

• An increase in temperature will increase the rate of a reaction.

• Decreasing the particle size will make particles move faster.

• Decreasing the concentration of reactants will increase the rate at which products yield.

To measure rate of reaction, we can monitor change in which of the following?

• concentration reactants or products

• colour of products

• mass product

• pH level of reactant

• temperature product

The rate of reaction is the change in the ............ of a reactant or product per unit of ...............

• temperature, pressure.

• mass, concentration.

• pressure, time.

• concentration, time.

• mass, temperature.

2N₂O_5(g) → 4NO_2(g) + O_2(g)

rate of following reaction is ........................

The following data were measured for the reaction

BF_3(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the order in [BF₃] ?

• 1

• 0

• 3

• 4

• 2

The following data were measured for the reaction

BF_3(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the order in [NH₃] ?

• 4

• 2
• 1
• 0
• 3

The following data were measured for the reaction

BF_3(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate constant (k) of the reaction?

• 0.625

• 0.213

• 2.596

• 3.408

• 1.193

The following data were measured for the reaction

BF_3(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate when [BF₃] = 0.100 M and [NH₃] = 0.500 M ?

• 0.1704 M/s

• 0.852 M/s

• 0.0625 M/s

• 0.3125 M/s

• 0.0852 M/s