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Updated on October 17, 2023

In this article, we will explore the concept of ethane gas (C2H6) at standard temperature and pressure (STP) and delve into the fascinating question of how many molecules are present in 64.28 liters of this compound. Through a series of headings and subheadings, we will break down the topic to ensure a comprehensive understanding.

Introduction to Ethane Gas

To begin our exploration, let’s establish a fundamental understanding of what ethane gas (C2H6) is and its properties at standard temperature and pressure.

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What is Ethane Gas?

Ethane (C2H6) is a hydrocarbon molecule, primarily composed of carbon and hydrogen atoms. It is a colorless and odorless gas that is commonly found in natural gas and petroleum.

Standard Temperature and Pressure (STP)

Before we proceed, let’s define the concept of standard temperature and pressure (STP) and why it’s essential in our discussion.

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Avogadro’s Number and Molar Volume

In this section, we will introduce Avogadro’s number and its significance in calculating the number of molecules in a given volume of gas.

Avogadro’s Number

Avogadro’s number (6.022 x 10^23) represents the number of atoms, ions, or molecules in one mole of a substance. It plays a crucial role in determining the quantity of particles in a given amount of a substance.

Molar Volume of a Gas

The molar volume of a gas is the volume occupied by one mole of that gas at a specific temperature and pressure. At STP, the molar volume of any ideal gas is 22.4 liters.

Calculating Molecules in Ethane Gas at STP

Now that we have the necessary background information, let’s calculate how many molecules are present in 64.28 liters of ethane gas at STP.

Step 1: Determine the Number of Moles

To find the number of molecules, we first need to calculate the number of moles of ethane gas in 64.28 liters.

Step 2: Using Avogadro’s Number

Once we have the moles of ethane gas, we can apply Avogadro’s number to determine the total number of molecules.

Factors Affecting the Calculation

In this section, we will briefly discuss some factors that can influence the accuracy of our calculation.

Ideal Gas Assumption

Our calculation assumes that ethane gas behaves as an ideal gas at STP. Real gases may deviate slightly from ideal behavior under certain conditions.

Purity of Ethane Gas

The purity of the ethane gas sample can affect the accuracy of our calculation. Impurities in the sample can lead to deviations.

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Practical Applications

Understanding the number of molecules in a given volume of ethane gas has practical applications, which we will explore in this section.

Industrial Uses

Ethane gas is widely used in various industrial processes, including petrochemical production and as a fuel source.

Environmental Impact

Exploring the quantity of ethane gas molecules can help in assessing its environmental impact, especially in the context of greenhouse gas emissions.


In conclusion, we have delved into the concept of ethane gas (C2H6) at STP and calculated the number of molecules in 64.28 liters of this compound. This calculation provides valuable insights into the properties and applications of ethane gas.

FAQs (Frequently Asked Questions)

1. Is ethane gas harmful to the environment?

Ethane gas itself is not harmful to the environment. However, its combustion can contribute to greenhouse gas emissions if not properly managed.

2. Can ethane gas be used as a household fuel?

Ethane gas is not commonly used as a household fuel due to its limited availability. Natural gas, which contains ethane among other hydrocarbons, is used for heating and cooking.

3. Are there any safety precautions when handling ethane gas?

Yes, like any flammable gas, ethane should be handled with care. Safety measures include proper ventilation, avoiding open flames, and storing it in suitable containers.

4. What are the other applications of ethane gas besides industrial use?

Ethane gas is used in the production of ethylene, a key ingredient in plastics manufacturing. It also has applications in the refrigeration industry.

5. Can ethane gas be converted into other compounds?

Yes, ethane can be converted into various products through processes like steam cracking, which is essential in the petrochemical industry.

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