Chemistry Ratios

Select the correct molar ratio taken from this balanced equation:

4 Al + 3 O₂ --> 2 Al₂O₃

• 1 mol Al = 1 mol Al₂O₃

• 4 Al = 2 Al₂O₃

• 4 mol Al = 2 mol Al₂O₃

• 4 mol Al = 2 mol Al

Tags

NGSS.HS-PS1-7

Select the correct molar ratio taken from this balanced equation:

1 N­₂ + 3 H₂ --> 2 NH₃

• 1 N­₂ = 3 H₂

• 1 mol N­₂ = 2 mol NH₃

• 2 mol N­₂ = 1 mol NH₃

• 3 mol N­₂ = 3 mol NH₃

Select the coefficients that correctly balance the following skeleton equation:

__ H₂O --> __ H₂ + __ O₂

• 2 --> 2, 1

• 1 --> 1, 2

• 4 --> 2, 2

• 2 --> 2, 4

4 Al + 3 O₂ --> 2 Al₂O₃

_{How many moles of} Al₂O_{3 will be produced from 250.0 g of Al?}

_{( 26.982 g Al = 1 mol Al)}

• 18.531 mol Al₂O₃

• 4.633 mol Al₂O₃

• 6.949 mol Al₂O₃

• 12.354 mol Al₂O₃

Tags

NGSS.HS-PS1-7

2 KClO₃ → 2 KCl + 3 O₂
How many moles of oxygen are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol
• 1.0 mol
• 10.1 mol
• 4.5 mol

CH₄ + 2 O₂ → CO₂ + 2 H₂O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH₄?

• 13.7 mol
• 2.75 mol
• 6.11 mol
• 6.85 mol

N₂ + 3H₂ --> 2NH₃
What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7
• 2.0
• 3.0
• 15.0

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7
• 2.0
• 3.0
• 15.0

2Na + S -->Na₂S
What is the total number of moles of Na₂S produced when 8.0 moles of Na were completely consumed?

• 1
• 2
• 0.5
• 4

H₂+Cl₂-->2HCl
What is the total number of moles of HCl produced when 3 moles of H₂ is completely consumed?

• 5
• 2
• 3
• 6

Tags

NGSS.HS-PS1-7