/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 25 Write a poem that explains the d... [FREE SOLUTION] | 91影视

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Chapter 8: Problem 25

Write a poem that explains the difference between a substance and a mixture.

Short Answer

Expert verified
A substance is pure with fixed properties, while a mixture contains varied components that can be separated.

Step by step solution

01

- Understand Definitions

Learn the definitions. A substance is a form of matter with a specific and uniform composition, such as elements or compounds. A mixture, on the other hand, is a combination of two or more substances where each retains its own identity.
02

- Identify Key Characteristics

Substances have fixed properties and a uniform structure, while mixtures have variable compositions and can be separated into their components.
03

- Outline Poem Structure

Decide on the format of the poem. Will it be a rhyming poem or free verse? Plan the number of lines, stanzas, and any rhyme schemes.
04

- Write the Poem

Using the definitions and characteristics from previous steps, craft your poem. Ensure it captures the essence of what makes a substance and a mixture different.
05

- Refine and Edit

Go through the poem and make sure it flows well. Check for accuracy in describing the concepts and make any necessary adjustments for clarity and poetic form.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Substance
A substance is a single type of material with a constant and uniform composition. This means that every part of the substance has the same makeup and properties.
Imagine water (H鈧侽). Whether you look at it in a glass or in a lake, it remains consistent. Some key points about substances are:
  • They can be elements or compounds.
  • Elements are made up of one type of atom, like hydrogen (H).
  • Compounds contain two or more atoms bonded together, like table salt (NaCl).
Substances have fixed characteristics, such as melting points and boiling points. This uniformity makes them special and distinct from mixtures.
Mixture
A mixture consists of two or more substances combined together. However, each substance in the mixture retains its individual properties and can be separated physically.
For example, consider a salad. It has various ingredients like lettuce, tomatoes, and cucumbers. Even when mixed, each ingredient maintains its identity. Key points about mixtures include:
  • They can be homogeneous or heterogeneous.
  • Homogeneous mixtures, like saltwater, have a uniform composition throughout.
  • Heterogeneous mixtures, like a salad, have a non-uniform composition.
Mixtures do not have a fixed composition. This means the amount of each component can vary, and the properties of mixtures are not uniform throughout.
Composition
Composition refers to how substances or mixtures are made up. It describes which elements or compounds are present and in what ratios.
For substances, composition is fixed. For instance, water always has a 2:1 ratio of hydrogen to oxygen.
In mixtures, composition can vary. You can have more or less of one substance and it will still be a mixture. Examples of each include:
  • A chemical substance like pure iron (Fe) always has a stable composition of iron atoms.
  • A mixture like chocolate chip cookies can have different amounts of chocolate chips in each cookie.
Understanding composition is crucial because it helps us to identify and differentiate between substances and mixtures more clearly.

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Most popular questions from this chapter

Choose the word or phrase that best answers the question. Which of the following is a solution? A) pure water B) an oatmeal-raisin cookie C) copper D) vinegar

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