Ratios and Rates

N₂ +  3H₂ → 2NH₃ 
What is the mole ratio between Nitrogen and Ammonium in the above reaction?

• 1 moles NH₃ / 2 moles N₂ 

• 3 moles NH₃ / 1 moles N₂ 

• 2 moles N₂ / 2 moles NH₃ 

• 1 moles N₂ / 2 moles NH₃ 

Tags

NGSS.MS-PS1-1

What is the mole ratio of P₄ to O₂?

• 1:3

• 1:2

• 3:2

• 3:1

Tags

NGSS.HS-PS1-7

What is the mole ratio of NaCl to Ca₃(PO₄)₂?

• 1:6

• 6:1

• 2:3

• 3:2

Tags

NGSS.HS-PS1-7

Hg(OH)₂ + 2 H₃PO₄ → Hg₃(PO₄)₂ + 6 H₂O

What is the mole ratio of Hg₃(PO₄)₂ to H₃PO₄?

• 1 to 2

• 2 to 1

• 2 to 3

• 3 to 2

Tags

NGSS.MS-PS1-5

What is the mole ratio of Hg(OH)₂ to Hg₃(PO₄)₂ ?

• 1 to 2

• 2 to 1

• 3 to 1

• 1 to 3

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-5

Does the Driving Gear or Driven Gear have the motor attached?

• The Driving Gear has the motor attached

• The Driven Gear has the motor attached

A 12 Tooth driving gear (connected to the motor) is connected to a 36 tooth driven gear. What is the gear ratio and mechanical advantage?

• 3: 1 Torque Advantage

• 3: 1 Speed Advantage

• no Mechanical Advantage

Tags

NGSS.MS-PS2-2

What is the mechanical advantage of this gear ratio?

• Torque Advantage

• Speed Advantage

• no Mechanical Advantage

Tags

NGSS.MS-ETS1-2

In a chemical reaction, the ratio of reactants to products is 1:3. If you start with 2 moles of reactants, how many moles of products will be formed?

• 2 moles

• 3 moles

• 6 moles

• 9 moles

Tags

NGSS.MS-PS1-5