Stoichiometry

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ reacts with 8 moles O₂?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

Use the following equation:
2NaOH(aq) + H₂SO₄(aq) → 2H₂O(l) + Na₂SO₄(aq)
How many moles of Na₂SO₄will be formed if 5 moles NaOH reacts with 2 moles H₂SO₄?

• 2.5 moles Na₂SO₄
• 2 moles Na₂SO₄
• 5 moles Na₂SO₄
• 7 moles Na₂SO₄

Tags

NGSS.HS-PS1-7

What is the net ionic equation for this reaction?  2NaOH(aq) + H₂SO₄(aq) → 2H₂O(l) + Na₂SO₄(aq)

• H⁺(aq) + OH^1-(aq) → H₂O(l)
• 2 Na⁺(aq) + OH^1-(aq)  + SO₄^2-(aq) → H₂O(l) + Na₂SO₄(aq)
• 2 OH^1-(aq) + H₂SO₄(aq) → 2H₂O(l) + Na₂SO₄(aq)  
• H₂²⁺(aq) + 2 OH^1-(aq) → 2 H₂O(l)

Using the following equation:
Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)
How many moles of iron can be made from 3 moles Fe₂O₃ and 6 moles H₂? 

• 4 moles Fe
• 6 moles Fe
• 9 moles Fe
• 2 moles Fe

Tags

NGSS.HS-PS1-7

What is the reading on this buret?

• 4.40mL
• 3.50mL
• 3.60mL
• 4.50mL