608 Quiz Practice: Molar Ratios and Conversions

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

• 1 moles NH₃ / 2 moles N₂ 
• 2 moles NH₃ / 1 moles N₂ 
• 2 moles N₂ / 3 moles NH₃ 
• 1 moles N₂ / 3 moles NH₃ 

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂ 
What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5
• 6
• 12
• 15

Tags

NGSS.HS-LS1-6

NGSS.HS-PS1-2

3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe
What is the Ratio of moles of Mg to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

H₂+Cl₂-->2HCl
How many moles of Cl₂ are needed to react with 3 moles of H₂?

• 5
• 2
• 3
• 6

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

Where are the numbers for a mole ratio found?

• They are part of the chemical formulas for the reactants / products.

• They are given in the problem.

• They are found on the periodic table for those elements.

• They are found as coefficients in the reaction's balanced chemical equation.

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-7

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?

• 
• 
• 
• 

Given the reaction: 4Al + 3O₂ --> 2Al₂O₃

How many moles of Aluminum oxide are produced if you have 2 moles of Al?

• 3 mole

• 2 mole

• 1 mole

• 0.5 mole

Tags

NGSS.MS-PS1-5

6CO₂ + 6H₂O --> C₆H₁₂O₆ + 6O₂

What is the total number of moles of water needed to produce 2.5 moles of C₆H₁₂O₆?

• 2.5

• 6

• 12

• 15

Tags

NGSS.HS-LS2-5