Stoichiometry Basics (2024)

2H₂ + O₂ → 2H₂O

How many moles of water can be produced if 8 moles O₂ reacts completely?

• 4 moles

• 8 moles

• 16 moles

• 2 moles

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NGSS.HS-PS1-7

Using the following equation:

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

How many moles of iron can be made from 9 moles H₂?

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

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NGSS.HS-PS1-7

How many moles of N₂ can be produced if 10.0 moles of NH₃ react?

4NH₃ + 6NO → 5N₂ + 6H₂O

• 12.5 moles

• 8.00 moles

• 10.0 moles

• 50.0 moles

4NH₃ + 5O₂ → 4NO + 6H₂O

What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15 moles

• 18 moles

• 20 moles

• 24 moles

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

What is the total number of moles of water needed to make 0.25 moles of C₆H₁₂O₆?

• 0.25 moles

• 1.5 moles

• 0.042 moles

• 5.25 moles

Tags

NGSS.HS-PS1-7

NGSS.HS-LS2-5

2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

Al₂(SO₄)₃ = 342.15 g/mol. and. H₂SO₄ = 98.08 g/mol

• 0.85 g
• 290 g
• 450 g
• 870 g

Tags

NGSS.HS-PS1-7

CH₄ + 2O₂ → 2H₂O + CO₂
What is the mass of CO₂ produced when 35g of O₂ reacts? 

CO₂ = 44.01 g/mol. O₂ = 32.00 g/mol

• 1.09 g
• 24.1 g
• 28.2 g
• 44.0 g

Tags

NGSS.HS-PS1-7

Cl₂ + 2KBr → Br₂ + 2KCl

How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?

KCl = 74.55 g/mol ; KBr = 119.00 g/mol

• 749 g

• 223 g

• 479 g

• 814 g

Tags

NGSS.HS-PS1-7