Ratio Rates

What is the ratio of the rate of effusion of hydrogen gas to that of oxygen gas according to Graham's law?

• 4:1

• 1:4

• 2:1

• 1:2

In a chemical reaction, the rate of reaction is directly proportional to the concentration of reactants. What is this relationship called?

• Rate Law

• Graham's Law

• Boyle's Law

• Avogadro's Law

Tags

NGSS.HS-PS1-5

If two chemicals react at a rate proportional to the product of their concentrations, what is the order of the reaction?

• Zero order

• First order

• Second order

• Third order

Tags

NGSS.HS-PS1-5

Which of the following is a unit of rate constant for a first-order reaction?

Tags

NGSS.HS-PS1-5

In enzyme kinetics, what does the Michaelis-Menten constant (Km) represent?

• The substrate concentration at which the reaction rate is half of Vmax

• The maximum rate of the reaction

• The rate of product formation

• The rate of substrate consumption

What is the ratio of the rate of diffusion of two gases, A and B, if the molar mass of A is 16 g/mol and B is 64 g/mol?

• 2:1

• 1:2

• 4:1

• 1:4

Which factor does NOT affect the rate of a chemical reaction?

• Temperature

• Concentration of reactants

• Presence of a catalyst

• Color of reactants

Tags

NGSS.HS-PS1-5

In a reaction, if the concentration of a reactant is doubled and the rate of reaction remains unchanged, what is the order of the reaction with respect to that reactant?

• Zero order

• First order

• Second order

• Third order

Tags

NGSS.HS-PS1-5

What is the term for the minimum energy required for a chemical reaction to occur?

• Activation energy

• Kinetic energy

• Potential energy

• Thermal energy

In a catalyzed reaction, how does the presence of a catalyst affect the activation energy?

• Increases it

• Decreases it

• Does not change it

• Doubles it