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Questions and Answers
What type of bond is formed between the carbon and hydrogen atoms in propane?
What type of bond is formed between the carbon and hydrogen atoms in propane?
- Electrostatic bond
- Van der Waals bond
- Covalent bond (correct)
- Ionic bond
What is the difference between a cation and an anion?
What is the difference between a cation and an anion?
- A cation is a negatively charged ion, while an anion is a positively charged ion
- A cation is a positively charged ion, while an anion is a negatively charged ion (correct)
- A cation is an atom, while an anion is a molecule
- A cation is a molecule, while an anion is an atom
What is the balanced equation for the combustion of propane?
What is the balanced equation for the combustion of propane?
- C3H8 + O2 -> CO2 + H2O
- C3H8 + 5O2 -> 3CO2 + 4H2O (correct)
- C3H8 + 3O2 -> 2CO2 + 2H2O
- C3H8 + 2O2 -> CO2 + 2H2O
What is the product of the combustion reaction of ethanol (C2H5OH)?
What is the product of the combustion reaction of ethanol (C2H5OH)?
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What type of bond is formed between the oxygen atoms in oxygen gas (O2)?
What type of bond is formed between the oxygen atoms in oxygen gas (O2)?
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Study Notes
Chemical Reactions
- Propane (C3H8) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O)
- The balanced chemical equation for this reaction is: C3H8 + 5O2 → 3CO2 + 4H2O
Types of Chemical Bonds
- Covalent bonds: formed when two atoms share one or more pairs of electrons
- Example: Hydrogen molecule (H2) forms a covalent bond when two hydrogen atoms share two electrons
- Ionic bonds: formed when one or more electrons are transferred from one atom to another, resulting in ions with opposite charges
- Example: Sodium chloride (NaCl or table salt) forms an ionic bond when sodium loses an electron to become Na+ and chlorine gains an electron to become Cl-
Ions
- Cations: positively charged ions, formed when an atom loses one or more electrons
- Example: Sodium (Na) becomes Na+ when it loses an electron
- Anions: negatively charged ions, formed when an atom gains one or more electrons
- Example: Chlorine (Cl) becomes Cl- when it gains an electron
Balancing Chemical Equations
- The equation C2H5OH + O2 → CO2 + H2O needs to be balanced
- The balanced equation is: C2H5OH + 3O2 → 2CO2 + 3H2O
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