Stoichiometry Review

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

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NGSS.HS-PS1-7

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4
• 4:6
• 1:3
• 3:1

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NGSS.HS-PS1-7

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

• 0.85 g
• 290 g
• 450 g
• 870 g

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NGSS.HS-PS1-7

For the reaction represented by the equation Cl₂ + 2KBr → Br₂ + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?

• 749 g
• 225 g
• 479 g
• 814 g

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NGSS.HS-PS1-7

Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)

• 1,2,2,2
• 1,2,1,1
• 2,1,1,1
• 2,1,2,1

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NGSS.HS-PS1-7

What is the first thing you must do to solve a stoichiometry problem?

• Make sure the chemical reaction is Balanced

• Panic

• Make sure the Equation is Unbalanced

• Multiple by Avogadro's Number

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NGSS.HS-PS1-7

How many moles of H₂ are needed to react with 2 moles of N₂ according to the reaction?

1 N₂ + 3 H₂ → 2 NH₃

• 6

• 2

• 3

• 1

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NGSS.HS-PS1-7

How many moles of H₂O can be produced if 8 moles of H₂ are reacted according to the following reaction?

2 H₂ + 1 O₂ → 2 H₂O

• 4 moles

• 8 moles

• 16 moles

• 2 moles

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NGSS.HS-PS1-7

If 12.00 moles of NaClO₃ react, how many moles of O₂ will be produced according to the reaction?

2 NaClO₃ → 2 NaCl + 3 O₂

• 12 moles of O₂

• 18 moles of O₂

• 9 moles of O₂

• 6 moles of O₂

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NGSS.HS-PS1-7

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

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

Tags

NGSS.HS-PS1-7