Practice Mole Concept And Stoichiometry (5) - Mole Concept and Stoichiometry

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6 sample questions

Question 1.
What is one mole equal to in terms of particles?
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Remember the name associated with this number.
Question 2.
What is the molar mass of carbon dioxide (CO₂)?
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Calculate using the atomic masses from the periodic table.
3Question 3.
What is Avogadro's number?
- 6.022 x 10²³
- 3.014 x 10²²
- 1.2 x 10²⁵
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It's the foundational number in the mole concept.
4Question 4.
Stoichiometry involves which of the following?
- True
- False
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Consider what stoichiometry means in terms of chemical reactions.
Question 5.
A researcher combines 10 grams of magnesium with 20 grams of hydrochloric acid. Determine the limiting reactant and how much hydrogen gas can be produced.
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Just balance the reaction and calculate moles of each reactant.
Question 6.
Calculate the volume of gas produced when 4 moles of ethylene (C₂H₄) reacts with 5 moles of oxygen (O₂) in the reaction: 2C₂H₄ + 7O₂ → 4CO₂ + 6H₂O.
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Remember to account for gases at STP when using our volume conversions.

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