For second order reaction, the initial concentration of reactant A is 0.24 M. If the rate constant is 8.1 x 10^-2 M^-1 s^-1, what is the concentration of A after 29 seconds?

• 0.02 M

• 0.15 M

• 0.30 M

• 0.45 M

Tags

NGSS.HS-PS1-5

Given the following balanced equation :

2NO(g) + Cl₂(g) → 2NOCl(g)

If the rate of disappearance of Cl₂ is 4.84 x 10^-2 Ms^-1, what is the rate of disappearance of NO?

• 1.45 x 10^-2 Ms^-1

• 2.42 x 10^-2 Ms^-1

• 3.67 x 10^-2 Ms^-1

• 9.68 x 10^-2 Ms^-1

Tags

NGSS.HS-PS1-7

The first order rate constant for the decomposition of 0.5 M compound A at 100^oC is 0.03 min^-1. Calculate the half-life of A.

• 1.5 min

• 8.3 min

• 23.1 min

• 66.7 min

Tags

NGSS.HS-PS1-5

What does [ ] denote?

• concentration, M

• concentration, m

• concentration, mass %

• squared

When you double the concentration of this reactant the rate of the reaction doesn't change.  It is ______ order

• First
• Second
• Zero

Tags

NGSS.HS-PS1-5

Which is an appropriate unit for the rate of a reaction?

• mol dm^-3 s

• mol dm^-3 s^-1

• mol dm^-3

• s

Tags

NGSS.HS-PS1-5

2 reactants which are dye (0.0001 M) and OH- (1.0 M) reacts to form products. The rate law for this reaction is

Rate = k[OH-]^x[dye]^y

• True

• False

Tags

NGSS.HS-PS1-5

What two factors govern whether a collision between reacting particles will be effective?

• orientation and potential energy 
• kinetic energy and temperature 
• kinetic energy and orientation 
• potential energy and kinetic energy 

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

• temperature
• catalysts
• particle size
• polarity

Tags

NGSS.HS-PS1-5

Which of the following factors increases only the effectiveness of collisions?

• temperature
• catalysts
• concentration
• particle size

Tags

NGSS.HS-PS1-5