Week 8 Quiz

Which compound below is a component of photochemical smog?

• N₂

• CO₂

• N₂O

• O₃

• CO

Tags

NGSS.HS-PS1-5

Ammonia gas (NH₃) is produced from hydrogen and nitrogen gas according to the following reaction:
3 H₂ (g) + N₂ (g) → 2 NH₃ (g)
If the rate of production of ammonia is R(NH₃), what is the rate of loss of hydrogen and nitrogen gas, respectively?

• -R(H₂) = 2/3 R(NH₃); -R(N₂) = 1/2 R(NH₃)

• -R(H₂) = 3/2 R(NH₃); -R(N₂) = 2 R(NH₃)

• -R(H₂) = 3/2 R(NH₃); -R(N₂) = 1/2 R(NH₃)

• -R(H₂) = 2/3 R(NH₃); -R(N₂) = 2 R(NH₃)

• -R(H₂) = R(NH₃); -R(N₂) = R(NH₃)

Tags

NGSS.HS-PS1-5

Determine the overall order of the reaction H₂ (g) + 2 ICl(g) → I₂ (g) + 2 HCl(g) from the data in the figure

• first

• second

• third

• fourth

• zero

Tags

NGSS.HS-PS1-5

The reaction of NO gas with H₂ gas has the following rate law: Rate = k[H₂][NO]². A proposed mechanism is:
Step 1: H₂ (g) + 2 NO(g) → N₂O(g) + H₂O(g)
Step 2: N₂O(g) + H₂(g) → N₂(g) + H₂O(g)
What is the molecularity of steps 1 and 2, and which step is the rate-determining step?

• 2; 2; step 1

• 4; 4; step 2

• 3; 2; step 1

• 3; 2; step 2

• Cannot be determined from the information provided

Tags

NGSS.HS-PS1-5

Which of the following reaction pathways shows the effect a catalyst (black) might have on an uncatalyzed reaction (gray)?

• 
• 
• 
• 
• none of these

Tags

NGSS.HS-PS1-4