EJU Japan · EJU Chemistry

Chemical Calculations

6 practice questions, each with the answer and an explanation.

Practise Chemical Calculations now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 6 questions

  1. A reaction should give 20 g of product in theory but 12 g is obtained. What is the percentage yield?
  2. A reaction should give 100 g of product in theory but 80 g is obtained. What is the percentage yield?
  3. A reaction should give 40 g of product in theory but 36 g is obtained. What is the percentage yield?
  4. A reaction should give 100 g of product in theory but 90 g is obtained. What is the percentage yield?
  5. A reaction should give 100 g of product in theory but 75 g is obtained. What is the percentage yield?
  6. A reaction should give 50 g of product in theory but 40 g is obtained. What is the percentage yield?

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