IB Chemistry
Mole Calculations Practice Hub

Practice with original ChemFunatics Paper 1 questions and step-by-step video explanations organised by IB topic.

QUESTION ID:

STO-MOL-0001

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<1 min

If 3.0 mol of Zn reacts with 6.0 mol of HCl

If 3.0 mol of Zn reacts with 6.0 mol of HCl

Zn + 2 HCl → ZnCl₂ + H₂

How many moles of H₂ are produced?

How many moles of H₂ are produced?

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QUESTION ID:

STO-MOL-0002

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<1 min

If 3.0 mol of NO and 1.0 mol of O₂ react according to the equation

If 3.0 mol of NO and 1.0 mol of O₂ react according to the equation

2 NO + O₂ → 2 NO₂

How many moles of NO₂ are produced?

How many moles of NO₂ are produced?

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QUESTION ID:

STO-MOL-0003

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<1 min

If 1.0 mol of N₂ reacts with 3.0 mol of H₂

If 1.0 mol of N₂ reacts with 3.0 mol of H₂

N₂ + 3 H₂ → 2 NH₃

How many moles of NH₃ can be produced?

How many moles of NH₃ can be produced?

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QUESTION ID:

STO-MOL-0004

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<1 min

From 3.0 mol of Na and 1.0 mol of Cl₂

From 3.0 mol of Na and 1.0 mol of Cl₂

2 Na + Cl₂ → 2 NaCl

How many moles of NaCl can be produced?

How many moles of NaCl can be produced?

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QUESTION ID:

STO-MOL-0005

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<1 min

Using 3.0 mol of SO₂ and 1.0 mol of O₂ in the reaction

Using 3.0 mol of SO₂ and 1.0 mol of O₂ in the reaction

2 SO₂ + O₂ → 2 SO₃

How many moles of SO₃ can be produced?

How many moles of SO₃ can be produced?

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QUESTION ID:

STO-MOL-0006

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<1 min

If 2.0 mol of CH₄ is reacted with 3.0 mol of O₂

If 2.0 mol of CH₄ is reacted with 3.0 mol of O₂

CH₄ + 2 O₂ → CO₂ + 2 H₂O

How many moles of H₂O can be produced?

How many moles of H₂O can be produced?

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QUESTION ID:

STO-MOL-0007

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<1 min

If 3.0 mol of KClO₃ are decomposed according to the reaction

If 3.0 mol of KClO₃ are decomposed according to the reaction

2 KClO₃ → 2 KCl + 3 O₂

How many moles of O₂ are produced?

How many moles of O₂ are produced?

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QUESTION ID:

STO-MOL-0008

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<1 min

If 3.0 mol of Mg reacts with 1.0 mol of O₂ according to the equation

If 3.0 mol of Mg reacts with 1.0 mol of O₂ according to the equation

2 Mg + O₂ → 2 MgO

How many moles of MgO can be produced?

How many moles of MgO can be produced?

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QUESTION ID:

STO-MOL-0009

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<1 min

If 4.0 mol of Fe reacts with 2.0 mol of O₂

If 4.0 mol of Fe reacts with 2.0 mol of O₂

4 Fe + 3 O₂ → 2 Fe₂O₃

How many moles of Fe₂O₃ are produced?

How many moles of Fe₂O₃ are produced?

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QUESTION ID:

STO-MOL-0010

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<1 min

If 2.0 mol of CaO reacts with 1.5 mol of CO₂

If 2.0 mol of CaO reacts with 1.5 mol of CO₂

CaO + CO₂ → CaCO₃

How many moles of CaCO₃ can be produced?

How many moles of CaCO₃ can be produced?

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QUESTION ID:

STO-MOL-0011

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<1 min

From 4.0 mol of CaCO₃ and 2.0 mol of H₃PO₄

From 4.0 mol of CaCO₃ and 2.0 mol of H₃PO₄

3 CaCO₃ + 2 H₃PO₄ → Ca₃(PO₄)₂ + 3 CO₂ + 3 H₂O

How many moles of Ca₃(PO₄)₂ can be produced?

How many moles of Ca₃(PO₄)₂ can be produced?

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QUESTION ID:

STO-MOL-0012

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<1 min

If 3.0 mol of Ca reacts with 6.0 mol of HCl

If 3.0 mol of Ca reacts with 6.0 mol of HCl

Ca + 2 HCl → CaCl₂ + H₂

How many moles of H₂ will be produced?

How many moles of H₂ will be produced?

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QUESTION ID:

STO-MOL-0013

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<1 min

If 4.0 mol of H₂ and 1.0 mol of O₂ are reacted according to the equation

If 4.0 mol of H₂ and 1.0 mol of O₂ are reacted according to the equation

2 H₂ + O₂ → 2 H₂O

How many moles of H₂O can be produced?

How many moles of H₂O can be produced?

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QUESTION ID:

STO-MOL-0014

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<1 min

From 3.0 mol of HCl and 1.5 mol of CaCO₃

From 3.0 mol of HCl and 1.5 mol of CaCO₃

2 HCl + CaCO₃ → CaCl₂ + H₂O + CO₂

How many moles of H₂O can be produced?

How many moles of H₂O can be produced?

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QUESTION ID:

STO-MOL-0015

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<1 min

Given 4.0 mol of KClO₃

Given 4.0 mol of KClO₃

2 KClO₃ → 2 KCl + 3 O₂

How many moles of O₂ can be produced?

How many moles of O₂ can be produced?

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QUESTION ID:

STO-MOL-0016

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<1 min

If 3.0 mol of C₂H₆ is reacted with 10.0 mol of O₂

If 3.0 mol of C₂H₆ is reacted with 10.0 mol of O₂

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

How many moles of H₂O can be produced?

How many moles of H₂O can be produced?

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QUESTION ID:

STO-MOL-0017

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<1 min

If 4.0 mol of C₂H₆ are reacted with 7.0 mol of O₂

If 4.0 mol of C₂H₆ are reacted with 7.0 mol of O₂

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

How many moles of H₂O can be produced?

How many moles of H₂O can be produced?

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QUESTION ID:

STO-MOL-0018

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<1 min

If 4.0 mol of Na reacts with excess Cl₂

If 4.0 mol of Na reacts with excess Cl₂

2 Na + Cl₂ → 2 NaCl

How many moles of NaCl will be produced?

How many moles of NaCl will be produced?

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QUESTION ID:

STO-MOL-0019

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<1 min

If 2.5 mol of CaO reacts with excess CO₂

If 2.5 mol of CaO reacts with excess CO₂

CaO + CO₂ → CaCO₃

How many moles of CaCO₃ are produced?

How many moles of CaCO₃ are produced?

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QUESTION ID:

STO-MOL-0020

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<1 min

If 3.0 mol of Zn reacts with 4.0 mol of HCl

If 3.0 mol of Zn reacts with 4.0 mol of HCl

Zn + 2 HCl → ZnCl₂ + H₂

How many moles of H₂ are produced?

How many moles of H₂ are produced?

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