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# Ideal Gas Equation Watch

1. What does the 'n' actually mean?

Say if we had a question asking us about the decomposition of Potassium Carbonate upon heating, what would the 'n' mean? Moles of oxygen or Potassium Carbonate?
2. In ideal gas the n stands for the number of moles of gas. Usually you can work out the number if moles of reactant if they give u it's formula and mass and then do a ratio of how many moles of gas. Look for state symbols though as though which have a G are the no. Of gas moles in your pv=nrt I hope this help and u haven't just told you what you already know

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What if we had several gaseous reactions?
4. I had a question like this yesterday! You would have to find the number of moles of each gas in your products and add them together for your overall number of gaseous moles

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5. Which gas is the 'n' referring to?
Which gas is the 'n' referring to?
Depends on the question
Some questions may say CO2 created a pressure of......
Find the no. Of moles.

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7. Here is the question:

Potassium nitrate strongly decomposes upon heating, forming oxygen and solid 'Y'.

So will the 'n' always be referring to a gaseous product never a reactant?
Here is the question:

Potassium nitrate strongly decomposes upon heating, forming oxygen and solid 'Y'.

So will the 'n' always be referring to a gaseous product never a reactant?
Yep unless question states so.
Sometime it will refer to two gaseous products and they may ask you to find the moles of oxygen from these two gaseous products in which you have to do molar ratio.

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9. Thanks!

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