Stoichiometry Problem AAMC #5 question

[Mushrooomboy]

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Does anyone know why it's 1/n instead of n? I don't really understand the explanation provided as the answer. Thanks

 

[TheMightyTexan]

Just a heads up, read the sticky threads before posting aamc material. I'll go ahead and note this so a mod can move it somewhere where it won't spoil it for people that havent seen the material yet

 

[nugang]

So in the case of this problem you can just think of it as a basic equillibrium equation, where for every n moles of CDP, you produce n moles of HPO4 and 1/n moles of (CP)n. For me it was easier to think about it by plugging in a number for n.

For example if n = 3. For every 3 moles of CDP, you produce 3 moles of HPO4. Compared that to CPn which has a 1:3 mole ratio with CDP, you only produce 1/3 moles of CDP. Therefore giving you the 1/n

 

[Mushrooomboy]

Very good answer thanks so much