# Relationship between Atomic PPM and Mole

• Chemistry
• 1question
In summary, the conversion from atomic to moles in this context is simply a matter of using a given ratio, as long as the ratio is held, the number can be anything. This is because the mole is just a means of expressing the amount of a chemical substance, similar to the number of atoms.
1question

## Homework Statement

Why does 25 atomic ppm oxygen mean 25 moles of oxygen in 1e6 mole Fe?

# = mol*Avo

## The Attempt at a Solution

I understand the ppm (parts per million) part. Hence why 25 ppm means 25:1e6. What I do not understand is how they go from atomic to moles...

The only way I can explain it is:

# = mol*Avo ---> Since Avogadro's number is a constant, the difference between # (atomic) and mol (moles) is just a given ratio (a number), thus you can use either... But then where is the conversion?...

Not sure what your question is. 25 ppm means 25 atoms per 106 atoms, 25 dozens of atoms per 106 dozens of atoms, 25 thousands of atoms per 106 thousands of atoms, 25*123456789 of atoms per 106*123456789 of atoms and so son. You can plug any number, including Avogadro's constant.

After all, mole is just an overgrown dozen.

1 person
Borek said:
After all, mole is just an overgrown dozen.

And to think I was impressed by a baker's dozen...

Thanks Borek. So what you're saying is that as long as the ratio is held, the number can be anything (even mole)? I forgot that mole is simply a means of expressing the amount of a chemical substance... just like # of atoms. Whoops.

1question said:
Thanks Borek. So what you're saying is that as long as the ratio is held, the number can be anything (even mole)?

Exactly.

## 1. What is the relationship between atomic PPM and mole?

The relationship between atomic PPM (parts per million) and mole is that atomic PPM is a unit of measurement used to express the concentration of a substance in a mixture, while mole is a unit of measurement used to express the amount of a substance. Atomic PPM is often used to measure the concentration of trace elements in a mixture, while mole is used to measure the amount of a substance in a given quantity of a mixture.

## 2. How are atomic PPM and mole related to each other?

Atomic PPM and mole are related to each other through the Avogadro's number, which is the number of particles in one mole of a substance. This means that for every one mole of a substance, there are Avogadro's number of particles, which can be measured in atomic PPM. For example, if a substance has a concentration of 1 PPM, it means that there is 1 part of the substance for every 1 million parts of the mixture, which can also be expressed as 1 mole per 1 million moles.

## 3. What is the significance of understanding the relationship between atomic PPM and mole?

Understanding the relationship between atomic PPM and mole is important in many scientific fields, particularly in chemistry and environmental science. It allows scientists to accurately measure and express the concentration of a substance in a mixture, which can have implications for human health and the environment. Additionally, this understanding is crucial for conducting accurate experiments and interpreting data in these fields.

## 4. How is the relationship between atomic PPM and mole used in real-world applications?

The relationship between atomic PPM and mole is used in various real-world applications, such as environmental monitoring, water quality testing, and pharmaceutical manufacturing. In environmental monitoring, scientists use atomic PPM and mole to measure the concentration of pollutants in air, water, and soil. In water quality testing, atomic PPM and mole are used to measure the levels of chemicals in drinking water. In pharmaceutical manufacturing, these units are used to ensure the correct amount of active ingredients in medications.

## 5. Are there any limitations to using atomic PPM and mole to measure substances?

While atomic PPM and mole are useful units of measurement, they do have some limitations. For instance, atomic PPM only measures the concentration of a substance in a mixture, but it does not provide information about the size or mass of the particles. Additionally, these units do not take into account the potential interactions between substances in a mixture, which can affect their overall concentration. It is important for scientists to consider these limitations when using atomic PPM and mole in their research.

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