Podcast Beta
Questions and Answers
If the volume occupied by oxygen (O2) is exactly half the volume of carbon dioxide (CO2) in the vessel, the moles of oxygen and carbon dioxide present in the vessel are:
The number of carbon atoms in 1 mole of propane is approximately:
If the reaction: N2 + 3H2 → 2NH3 includes 1 L of nitrogen reacting with 3L of hydrogen at room temperature and pressure, the volume of ammonia formed in the same condition is:
Which of the following samples of elements contain the same amount of atoms?
Signup and view all the answers
Which of the following statements is true?
Signup and view all the answers
For a fixed number of molecules of a gas, if the volume is changed the temperature will:
Signup and view all the answers
The maximum number of moles present in 5.4 g of aluminium (Al) is:
Signup and view all the answers
Number of atoms in 20 g of Ca is:
Signup and view all the answers
Study Notes
Mole and Volume Relationships
- If the volume of oxygen (O2) is half the volume of carbon dioxide (CO2), the moles of oxygen and carbon dioxide present are in a 1:2 ratio.
- The number of carbon atoms in 1 mole of propane is approximately 3.612 × 10^24.
Stoichiometry
- In the reaction N2 + 3H2 → 2NH3, 1 L of nitrogen reacts with 3L of hydrogen at room temperature and pressure, forming 2L of ammonia.
- The reaction follows a 1:3:2 mole ratio.
Avogadro's Law
- Samples of elements containing the same number of atoms are 2g of calcium, 1g of lithium, 2g of sodium, and 24g of Mg.
- These samples contain 1 mole of each element.
Mole and Mass Relationships
- The mass of 1 mole of H2 is 2g, not 1g.
- The mass of 1 mole of N2 at STP is 28g.
- One mole of any gas at STP occupies 22.4 L volume.
Gas Laws
- For a fixed number of molecules of a gas, if the volume is changed, the temperature will change accordingly.
- The temperature of a gas is directly proportional to its volume.
Mole Calculations
- The maximum number of moles present in 5.4 g of aluminium (Al) is 0.2 moles.
- The number of atoms in 20 g of Ca is approximately 6.023 × 10^23.
Molecule Mass
- The mass of one molecule of methyl alcohol (CH3OH) sample at STP is 3.20 × 10^-23 g.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Practice stoichiometry concepts with these multiple-choice questions, covering topics such as mole ratios and carbon atoms in propane.
