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Course: Edexcel Linear – OL (Chemistry)
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Curriculum

Edexcel Linear – OL (Chemistry)

1. Principles of Chemistry

0/47 Dr Dabour Hub Science Diagram and Course Material

2. Inorganic Chemistry

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3. Physical Chemistry

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4. Organic Chemistry

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Quiz

Chemical formulae, equations, calculations – Check yourself

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Chemical formulae, equations, calculations Edexcel O Level Modular Chemistry check yourself quiz: free practice for Edexcel Modular – OL (chemistry). Work through this Chemical formulae, equations, calculations Edexcel O Level Modular Chemistry check yourself quiz and get instant feedback on every answer. If you get stuck, review the 1e Chemical formulae, equations and calculations — Notes lesson. More practice: Edexcel Modular – OL (chemistry) — all units. Syllabus: Pearson Edexcel International GCSEs.

  • Questions count: 10
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
What is the Mr of H2SO4? (H = 1, S = 32, O = 16)
49
96
98
100
2.
How many moles are in 8.0 g of oxygen molecules, O2?
0.25 mol
0.50 mol
2.0 mol
4.0 mol
3.
A reaction had a theoretical yield of 20 g but produced 15 g. What is the percentage yield?
133%
25%
5%
75%
4.
The empirical formula of a compound is CH2O and its Mr is 180. What is its molecular formula?
C6H12O6
C3H6O3
CH2O
C12H22O11
5.
Why is magnesium heated to constant mass when finding the formula of magnesium oxide?
To remove water
To make sure all the magnesium has reacted
To cool the crucible
To let nitrogen escape
6.
When balancing an equation you may change:
The subscripts in formulae
The state symbols only
The numbers in front of formulae
The products formed
7.
Which statement best describes Relative atomic mass (Ar)?
The average mass of an atom of an element relative to 1/12 of the mass of a carbon-12 atom.
The actual number of atoms of each element in one molecule.
Actual yield divided by theoretical yield, multiplied by 100.
The simplest whole-number ratio of atoms of each element in a compound.
8.
Which statement best describes Mole?
The reactant that is completely used up and so determines the amount of product.
The maximum mass of product calculated from the equation.
The sum of the relative atomic masses of all the atoms in a formula.
The amount of substance containing 6.02 × 1023 particles (Avogadro constant).
9.
Which statement best describes Limiting reactant?
The amount of substance containing 6.02 × 1023 particles (Avogadro constant).
The mass of one mole of a substance, in g/mol, numerically equal to Mr.
The reactant that is completely used up and so determines the amount of product.
Actual yield divided by theoretical yield, multiplied by 100.
10.
Which statement best describes State symbols?
The amount of substance containing 6.02 × 1023 particles (Avogadro constant).
Labels (s), (l), (g), (aq) showing the physical state of each substance.
The reactant that is completely used up and so determines the amount of product.
The maximum mass of product calculated from the equation.
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Part of 1. Principles of Chemistry — see every lesson and quiz in this unit.
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