Chemistry Quiz on Matter and Mixtures

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Questions and Answers

Which of the following is NOT a characteristic of a compound?

  • It has the same properties as the elements that make it up. (correct)
  • It is made up of two or more elements chemically combined.
  • It has a fixed proportion of elements.
  • It can be broken down into simpler substances by chemical reactions.

What is the simplest form of matter that cannot be broken down into simpler substances by chemical means?

  • Element (correct)
  • Compound
  • Substance
  • Mixture

Which of the following is an example of a diatomic element?

  • Oxygen (O2) (correct)
  • Water (H2O)
  • Helium (He)
  • Sodium (Na)

Which of the following statements is TRUE about the composition of matter?

<p>Matter can be composed of either elements, compounds, or mixtures. (A)</p> Signup and view all the answers

Which of the following is a characteristic of a substance?

<p>The particles in a substance are all identical in composition. (B)</p> Signup and view all the answers

Which of the following is NOT a physical property of matter?

<p>Flammability (C)</p> Signup and view all the answers

What happens to the density of a substance if you cut it in half?

<p>The density remains the same. (B)</p> Signup and view all the answers

What is the term for the temperature at which a liquid transforms into a gas?

<p>Boiling point (A)</p> Signup and view all the answers

In a solution of salt water, what is the solvent?

<p>Water (C)</p> Signup and view all the answers

Which of the following would be considered a good example of high viscosity?

<p>Honey (A)</p> Signup and view all the answers

Which of the following is NOT a characteristic of a heterogeneous mixture?

<p>Components appear blended together. (A)</p> Signup and view all the answers

Which of the following is an example of a homogeneous mixture?

<p>Salt water (B)</p> Signup and view all the answers

What is the key difference between a substance and a mixture?

<p>Substances have a fixed composition, while mixtures have a variable composition. (C)</p> Signup and view all the answers

Which of the following is a characteristic shared by both homogeneous and heterogeneous mixtures?

<p>Components are physically combined. (B)</p> Signup and view all the answers

What is the main reason why a heterogeneous mixture is not uniform in appearance?

<p>The components are not evenly distributed. (C)</p> Signup and view all the answers

What is the volume of a rectangular prism that has the following dimensions: length = 12 cm, width = 5 cm, height = 3 cm?

<p>180 $cm^{3}$ (A)</p> Signup and view all the answers

A student is trying to determine the volume of an irregularly shaped rock. They fill a graduated cylinder with 50 mL of water, then drop the rock into the cylinder. The water level rises to 75 mL. What is the volume of the rock?

<p>25 mL (D)</p> Signup and view all the answers

A 10 g cube has a volume of 10 $cm^{3}$. What is the density of the cube?

<p>1 $g/cm^{3}$ (D)</p> Signup and view all the answers

What is the volume of a cylinder that has a radius of 5 cm and a height of 10 cm?

<p>1570 $cm^{3}$ (C)</p> Signup and view all the answers

What is the difference between the volume of a cube and the volume of a rectangular prism?

<p>A cube is a special type of rectangular prism where all sides are equal. (C)</p> Signup and view all the answers

Which of the following is NOT a sign that a chemical change has occurred?

<p>Change in shape (D)</p> Signup and view all the answers

A scientist combines two chemicals in a beaker. The beaker becomes hot and a new gas is released. Which of the following statements best explains what happened?

<p>The chemicals underwent a chemical change, and their composition changed. (A)</p> Signup and view all the answers

Why is the color change of a leaf in the fall considered a chemical change?

<p>Because the leaf is changing its chemical composition (B)</p> Signup and view all the answers

A student mixes salt and water. The salt dissolves in the water. What type of change has occurred?

<p>A physical change, because the salt and water can be separated (D)</p> Signup and view all the answers

Which statement BEST describes the Law of Conservation of Matter?

<p>The total mass of reactants in a chemical reaction always equals the total mass of products. (D)</p> Signup and view all the answers

Which of the following is NOT a chemical property?

<p>Boiling Point (D)</p> Signup and view all the answers

Which of the following is an example of a chemical change?

<p>Burning wood (D)</p> Signup and view all the answers

Which of the following is NOT a chemical change?

<p>Dissolving (C)</p> Signup and view all the answers

What is the difference between combustibility and flammability?

<p>Combustibility refers to the ease of ignition, while flammability refers to the ease of burning. (B)</p> Signup and view all the answers

Flashcards

Matter

Anything that takes up space and has mass; can be a substance or mixture.

Substance

A form of matter where all particles are identical in composition.

Element

The simplest form of matter, consisting of identical atoms; listed on the Periodic Table.

Compound

A substance formed from two or more elements chemically combined in fixed proportions.

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Diatomic

Elements that are stable as pairs of atoms, like O2 and N2.

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Mixture

A combination of two or more substances physically combined with variable composition.

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Homogeneous Mixture

A mixture with components evenly distributed, appearing blended at a microscopic level.

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Heterogeneous Mixture

A mixture where components are not evenly distributed and can be easily seen or separated.

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Solution

A type of homogeneous mixture where one substance is dissolved in another, creating a uniform mixture.

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Examples of Heterogeneous Mixtures

Common examples include salad dressing, paint, and cereal where components remain distinct.

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Physical Properties

Characteristics observed without changing the substance's makeup.

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Melting Point

The temperature where a solid turns to liquid, like ice melting.

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Boiling Point

The temperature at which a liquid transforms into gas, like boiling water.

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Viscosity

Resistance of a fluid to flow; changes with temperature.

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Density

A measure of mass per unit volume; remains constant regardless of size.

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Volume of a Regular Solid

The space occupied by a solid with a defined shape, calculated using specific geometric formulas.

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Volume Formula for Cube

The formula to calculate the volume of a cube or rectangular prism is $V = L \times W \times H$.

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Volume of a Cylinder

The volume of a cylinder is calculated using the formula $V = \pi r^{2} h$.

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Water Displacement Method

A technique to measure the volume of irregularly shaped objects by observing water level changes in a graduated cylinder.

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Density Calculation

Density is calculated as mass divided by volume: $Density = \frac{mass}{volume}$.

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Chemical Properties

Properties observed by changing the chemical identity of a substance.

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Combustibility

How easily a substance will set on fire, like burning charcoal.

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Reactivity

How easily a substance reacts, often with acids or bases.

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Oxidation

Reactivity of a substance with oxygen, such as iron forming rust.

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Chemical Changes

Changes that affect a substance's chemical properties, forming a new substance.

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Law of Conservation of Matter

Matter is neither created nor destroyed in a chemical reaction, meaning mass remains constant.

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Signs of Chemical Change

Indicators that a chemical reaction has occurred, such as light release or odor change.

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Release of Gas

A sign of a chemical change where gas is produced during a reaction, often visible as bubbles.

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Temperature Change in Reactions

A change in temperature indicating a chemical reaction, can be either heat release or absorption.

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Precipitate Formation

The sudden appearance of a solid in a solution during a chemical reaction, indicating a change has occurred.

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