Molecular Structure and Substance Properties

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Questions and Answers

Which statement accurately describes the relationship between molecular structure and a substance's properties?

Molecular structure only determines the state of matter (solid, liquid, or gas).
Molecular structure has no impact on a substance's physical properties.
Molecular structure only affects chemical properties, not physical ones.
The three-dimensional arrangement of atoms in a molecule influences its physical and chemical properties. (correct)

Intensive properties, such as mass and volume, depend on the amount of substance present.

False (B)

Explain how the arrangement of atoms in a substance relates to its crystal structure.

Crystal structure is the specific, repeating arrangement of atoms, ions, or molecules in a crystalline solid.

In a chemical reaction, the substances that are formed are called ______.

products Signup and view all the answers

Match the following types of chemical bonds with their descriptions:

Ionic bond = Electrons are transferred between atoms Covalent bond = Electrons are shared between atoms Metallic bond = Electrons are delocalized among metal atoms Polar covalent bond = Unequal sharing of electrons between atoms Signup and view all the answers

Which of the following best describes a homogeneous mixture?

A mixture where the composition is uniform throughout. (B) Signup and view all the answers

Balancing a chemical equation ensures that the number of molecules is the same on both sides of the equations, but not necessarily the number of atoms.

False (B) Signup and view all the answers

How do the intermolecular forces in solids compare to those in gases, and how does this difference affect their shape and volume?

Solids have strong intermolecular forces, giving them a definite shape and volume; gases have very weak intermolecular forces, so they have no definite shape or volume. Signup and view all the answers

The simplest whole-number ratio of atoms in a molecule represented in a chemical formula is called the ______ formula.

empirical Signup and view all the answers

What is the significance of Le Chatelier's principle in the context of chemical equilibrium?

It predicts how a system at equilibrium will respond to a change in conditions. (A) Signup and view all the answers

Flashcards

What is matter?

Anything with mass that occupies space.

What is a pure substance?

A substance with a fixed composition and distinct properties.