Classify each compound by the number of chlorine atoms indicated in the chemical formula.

The question as presented is incomplete. I have attempted an image that shows the full question:

The chemical formula from which we need to count the chlorine atoms are listed below:

Cr(ClO₃)₃
PCl₅
LiCl
CCl₂F₂
HClO₂
Ca(ClO₃)₂
CaCl₂
CCl₄

To determine the amount of chlorine in each formula, we just look at the subscript number to the right of each chlorine atom. That number states how many chlorine atoms are involved. If there is no number, it is implied that it is 1.

Cr(ClO₃)₃ = 3 chlorine atoms
PCl₅ = 5 chlorine atoms
LiCl = 1 chlorine atom
CCl₂F₂ = 2 chlorine atoms
HClO₂ = 1 chlorine atom
Ca(ClO₃)₂ = 2 chlorine atoms
CaCl₂ = 2 chlorine atoms
CCl₄ = 4 chlorine atoms

The number of Cl atoms of each compound is based on its subscript index

Further explanation

The naming of chemical compounds is giving a special name to a compound that aims to facilitate the classification of compounds and facilitate the identification of a compound. The rules for naming chemical compounds have been determined by the IUPAC (International Union of Pure and Applied Chemistry)

This nomenclature includes the naming of ion compounds, covalent compounds, and polyatomic

For ionic compounds consisting of cations (ions +) and anions (ions -)

The naming is preceded by the cation then the anion with the -ide suffix added

Generally for this ion compound consists of metal elements as cations and non-metals as anions

1. For metal and non-metal compounds

Metal: cation, positively charged.

Nonmetal: negative anion.

The anion cation's charge is crossed

Example:

Fe₂S₃

Fe charge = +3

S charge = -2

The name: metal + non-metal + -ide

Example: BaCl₂ -> Barium chloride

For transition metals, which have several oxidation charges / numbers, write the oxidation number in roman numbers

Example: SnO: lead (II) oxide

SnO₂: lead (IV) oxide

2. For metal and non-metal compounds

The naming: name non-metal + non-metal + suffix -ide

In the elements given the prefix mono, di, tri, tetra, penta if more than one element is formed

Example:

SO₂: Sulfur dioxide

SO₃: Sulfur trioxide

The question that needs to be completed is

The compound are (just look the subscript to count Cl atoms)

1. Cr(ClO₃)₃

Cl =  3 atoms

2. PCl₅

Cl = 5 atoms

3. LiCl

Cl = 1 atom

4. CCl₂F₂

Cl = 2 atoms

5. HClO₂

Cl = 1 atom

6. Ca(ClO₃)₂

Cl = 2 atoms

7. CaCl₂

Cl = 2 atoms

CCl₄

Cl = 4 atoms

Learn more

the chemical formula for each ionic compound.

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two functional groups that contain ionic charges

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Binary ionic compounds

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Keywords: chemical compound, the naming of chemical compounds

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.

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