TPR FL2 #47

Started by akimhaneul
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akimhaneul

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Can anyone help me with the parts per million calculation? Thanks!

They said the answer is D.
 

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Cy stands for parts per million. So let's just say it's some number like Cy = 8.

That means in 10^6 parts of something, 8 of those parts are y.

To get the fraction (representing how much y there is in the total amount of stuff) we divide Cy / 10^6.

To get Py (partial pressure), we multiply the fraction by the total pressure Ptot.