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You use the atomic mass. Multiply each element by its atomic mass on the periodic table. Then add the totals up.
can you please how me all the work i need it for an example so i can see how its done so i can do the rest by my self please?
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Okay, hang on a sec.
Here are the masses of all the elements in the second chemical compound. potassium | 39.0983 u (unified atomic mass units) phosphorus | 30.973762 u (unified atomic mass units) oxygen | 15.9994 u (unified atomic mass units)
From the compound we get, K*3 + P + O*4 = K3PO4 = 39.0983*3 + 30.973762 + 15.9994*4 =212.266262 u. U can be substituted for grams per mole or g/mol.
Does that help?
thats all you do so the answer would be 212.266262
Yep.
that seems too easy lol are you sure
Yeah, I'm sure.
thank you

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