Practice Environmental Science (6.2) - Stoichiometry - IB 10 Sciences (Group 4)

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9 questions

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2 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the mole concept in chemistry?
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Think about how chemists count atoms or molecules.
Question 2.
What does it mean to balance a chemical equation?
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Remember the law of conservation of mass!
3Question 3.
What is the value of Avogadro’s number?
- 6.022 x 10^22
- 6.022 x 10^23
- 6.022 x 10^24
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Remember that it helps to count atoms and molecules.
4Question 4.
True or False: A balanced chemical equation has the same number of each atom on both sides.
- True
- False
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Consider why balancing is necessary in chemistry.
Question 5.
A chemist has 10 grams of nitrogen and 5 grams of hydrogen. Given that the balanced reaction is : N2 + 3 H2 → 2 NH3. Determine the limiting reactant and calculate the maximum yield of ammonia produced.
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Balance the equation first and convert all quantities to moles.
Question 6.
If you mixed 3 moles of A with 5 moles of B in the reaction 2A + 3B → 4C. What is the theoretical yield of product C and what is the limiting reactant?
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Check which reactant makes the least amount of product.

5 more questions in this section. Enroll free to practise them all.