The image above represents the number concentration.

To compute for the number concentration, two essential parameters are needed and these parameters are **Number of Entities of the Constituent (N)** and **Volume (V).**

The formula for calculating the number concentration:

C = ^{N} ⁄ _{V}

Where;

C = Number Concentration

N = Number of Entities of the Constituent

V = Volume

Let’s solve an example;

Find the number concentration when the number of entities of the constituent is 12 and the volume is 24.

This implies that;

N = Number of Entities of the Constituent = 12

V = Volume = 24

C = ^{N} ⁄ _{V}

C = ^{12} ⁄ _{24}

C = 0.5

Therefore, the **number concentration** is **0.5 m ^{-3}.**

**Calculating the ****Number of Entities of the Constituent when Number Concentration and Volume is Given.**

N = VC

Where;

N = Number of Entities of the Constituent

C = Number Concentration

V = Volume

Let’s solve an example;

Find the number of entities of the constituent when the number concentration is 18 and the volume is 14.

This implies that;

C = Number Concentration = 18

V = Volume = 14

N = VC

N = 14 x 18

N = 252

Therefore, the **number of entities of the constituent** is **252 m ^{-1}.**

**Calculating the Volume ****when Number Concentration and Number of Entities of the Constituent is Given.**

V = ^{N} / _{C}

Where;

V = Volume

N = Number of Entities of the Constituent

C = Number Concentration

Let’s solve an example;

Find the volume when the number concentration is 280 and the number of entities of the constituent is 40.

This implies that;

C = Number Concentration = 280

N = Number of Entities of the Constituent = 40

V = ^{N} / _{C}

V = ^{280} / _{40}

V = 7

Therefore, the **volume** is **7 m ^{3}**.

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the number concentration.

To get the answer and workings of the number concentration using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **for** NGN 1,500 **per** annum** to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)** – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Basic Chemistry **under **Chemistry**

Now, Click on **Number Concentration** under **Basic Chemistry**

The screenshot below displays the page or activity to enter your values, to get the answer for the number concentration according to the respective parameters which are the **Number of Entities of the Constituent (N)**** **and **Volume (V)****.**

Now, enter the values appropriately and accordingly for the parameters as required by the **example** above where the **Number of Entities of the Constituent (N) **is **12**** **and **Volume (V) **is **24.**

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator** – The Calculator Encyclopedia solves for the number concentration and presents the formula, workings and steps too.