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1 month ago

Which substance can be decomposed by chemical means?

Chemistry

2 answers:

castortr0y [3K]1 month ago

8 0

The substance that is capable of being decomposed via chemical processes is $\boxed{{\text{c}}{\text{. methane}}}$ .

Further Explanation:

A substance is defined as a pure form of matter, whereas a mixture refers to a combination of atoms and molecules.

Substances can be classified into two categories:

1. Element

Elements are the purest substances and represent the most basic form which cannot be decomposed by chemical means. Examples include copper, iron, and cobalt.

2. Compound

Compounds consist of two or more different elements that are bonded together through chemical bonds. These can be broken down to reveal their constituent components, which exhibit distinct properties from those of the elements that make them up. NaCl, ${\text{C}}{{\text{O}}_{\text{2}}}$ and ${{\text{H}}_{\text{2}}}{\text{O}}$ are examples of compounds.

a. Cobalt is classified as an element, the simplest form in which it can exist. Hence, it cannot be decomposed through chemical processes.

b. Krypton is also an element, existing in its simplest form, and therefore cannot be chemically broken down.

c. Methane consists of one carbon atom and four hydrogen atoms, making it a compound. Since compounds can be broken down chemically, methane is also able to undergo decomposition.

d. Zirconium is an element, existing in its most basic form, and is not amenable to decomposition through chemical methods.

Learn more:

1. Which sample is a pure substance?

2. Which is a characteristic of a mixture?

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Elements, compounds, and mixtures

Keywords: substance, methane, cobalt, zirconium, krypton, element, compound, chemical means, decomposed, broken down, simplest form.

castortr0y [3K]1 month ago

5 0

Methane, option c, is a compound and therefore can undergo decomposition through chemical methods. It consists of one carbon atom and four hydrogen atoms. Unlike compounds, elements cannot be separated chemically. Cobalt, krypton, and zirconium are examples of elements that cannot be broken down.

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Percent Ionic Character:

This reflects the fraction of ionic nature within a polar covalent bond. The formula for %IC (% ionic character) is:

$Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^X^a^-^X^b^) * 100$

Here, Xa is the electronegativity of atom A and Xb is that of atom B.

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Electronegativity of Al = 1.6 (as shown in the provided image)

Substitute these values into the formula:

$Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^2^.^0^-^1^.^6^) * 100$

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