Stoichiometry Worksheet PDF
Stoichiometry Worksheet PDF
Stoichiometry Worksheet PDF
Complete the following table defining the following terms:(use your textbook glossary)
Mass
Molar Mass
Avogadro’s constant
Mole (Mol)
Just how big is Avogadro’s constant…one mole of sand grains would cover Britain to a depth
of 1500 km!
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
Mol is the unit used by all chemists to calculate the amount of substance
The number 6.02x1023 is very large and is named after the Italian chemist Amedeo
Avogadro it is otherwise known as Avogadro’s constant.
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
Stage 1: Calculate the relative formula mass substance (This is equal to 1 mol)
Stage 2: Calculate the number of moles of the substance; by dividing the mass
present by the relative formula mass of the substance.
Stage 1
Stage 2
Answer
Stage 1
Stage 2
Answer
Stage 1
Stage 2
Answer
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GOING FOR THE BORDER…CONVERTING MOLES TO MASS
MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
Stage 1: Calculate the relative formula mass of the substance (This is equal to 1
mol)
Stage 2: Calculate the mass of the compound; by multiplying the number of moles
by the relative formula mass of the compound
Stage 1
Stage 2
Answer
Stage 1
Stage 2
Answer
Stage 1
Stage 2
Answer
Calculate the moles in each of the following substances, write down your
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method for each one:
MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
Considering the diagram what is the mass of O2 required to form 2 moles of water?
2 Mg + O2 → 2 MgO (3)
3) What mass of carbon monoxide is needed to react with 100g of iron oxide?
4 Na + O2 → 2 Na2O (3)
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Thinking outside the box
Date........................ To improve
MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
Stage 1
Stage 2
Answer
Stage 1
Stage 2
Answer
Stage 2
Answer
Stage 2
Answer
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
3. What do you think are the most important steps in a reacting mass calculation
involving the moles? Put it into your own words:
:
Stage 1: Stage 2:
Stage 3: Stage 4:
4. Calculate the mass of sodium hydroxide which will react with 9.8 g of sulphuric
acid?
H2SO4 + 2 NaOH → Na2SO4 + 2 H2O
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MOLES/CHEMISTRY/IGCSE/SMJ 2011-12
5. Calculate the mass of chlorine which will react with 20 g of iron to form iron (III)
chloride?
2 Fe + 3 Cl2 → 2 FeCl3 ..
.. ..
.. .. ..
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