[faberaussie]

Hi all, I don't know if this is the right place where to post this question.
In my dataset, I have data relative to PO4-P in grams and I would like to convert them in moles.
My doubt: do I have to use the molecular weight of PO4 (about 95 g/mol) or the mass weight of P (about 31 g/mol) to do the conversion? thank you

[chenbeier]

What do you have given, gram of phosphate or gram of phosphorous.
The molar masses correspont to them.

[faberaussie]

I have grams of PO4-P. So should I consider it as grams of phosphorus? Thank you

[chenbeier]

I don't understand you.

For example do you have given 100g PO4 or do you have given 100g P.

[faberaussie]

Sorry if I was not clear.
In my dataset grams of PO4-P are reported, but I don't know if they were measured as P or as PO4.
PO4-P should be 'orthophosphate as phosphorus' as described here: https://www.hach.com/asset-get.download.jsa?id=50989301315.
So I suppose they correspond to grams of P in PO4. Right?
If this is the case, how can I convert grams of PO4-P in moles?
Thank you
 

[AWK]

Sorry if I was not clear.
PO4-P should be 'orthophosphate as phosphorus' as described here: https://www.hach.com/asset-get.download.jsa?id=50989301315.
So I suppose they correspond to grams of P in PO4. Right?
Thank you

Your link answers this question unambiguously. Would you like someone to read this long work for you?

Converting mass to moles is the complete start of general chemistry.

[Borek]

_IF_ it is phosphate as phosphorus, then you have mass of P and molar mass of P, plug and chug.

[faberaussie]

Ok thank you