Quantitative Chemistry Quiz
Test your knowledge of Quantitative Chemistry, as part of GCSE Chemistry with this quiz.
This quiz consists of 15 questions, including multiple-choice and short-answer questions on the topic of Quantitative Chemistry for GCSE Chemistry.
For multiple-choice questions, choose the correct answer. Scroll down to begin the quiz.
Questions
What is the formula for calculating the number of moles in a substance?
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What is the volume of one mole of gas at room temperature and pressure (RTP)?
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Which of the following is the correct unit for concentration?
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What is atom economy a measure of?
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Why is a high percentage yield important in industry?
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What is meant by the term ‘mole’ in chemistry?
A mole is the amount of a substance that contains 6.022 × 10²³ particles (Avogadro’s number) of atoms, molecules, or ions.
Calculate the relative formula mass (Mr) of carbon dioxide (CO₂).
C = 12, O = 16
Mr = (12 × 1) + (16 × 2) = 44
How do you calculate the percentage yield of a reaction?
Percentage Yield = (Actual Yield ÷ Theoretical Yield) × 100
A reaction produces 15 g of a product, but the theoretical yield was 20 g. Calculate the percentage yield.
(15 ÷ 20) × 100 = 75%
Why might the actual yield of a reaction be lower than the theoretical yield?
Possible reasons include incomplete reactions, loss of product during transfer, or side reactions occurring.
How do you calculate the concentration of a solution in mol/dm³?
Concentration (mol/dm³) = Moles of solute ÷ Volume of solution (dm³)
What is the atom economy of a reaction that produces 50 g of useful product from 200 g of reactants?
(50 ÷ 200) × 100 = 25%
What is the equation to calculate the mass of a substance using moles?
Mass = Moles × Molar Mass
Why is atom economy important in sustainable chemistry?
It helps reduce waste, makes processes more efficient, and ensures that more of the reactants are converted into useful products.
If 2.5 moles of oxygen gas (O₂) are present at RTP, what volume do they occupy?
Volume = Moles × 24 dm³
= 2.5 × 24 = 60 dm³
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