What is the molecular weight of $H_3PO_4$ ?

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Answer 1 · 2015-11-29T23:31:24

If you take a look at a periodic table, let $Z$ be the atomic number and $MM$ be the molar mass of atom $X$ :

$Z_"H" = 1$
$MM_"H" = 1.0079$

$Z_"P" = 15$
$MM_"P" = 30.974$

$Z_"O" = 8$
$MM_"O" = 15.999$

Just note how many of each atom is in the compound, and add accordingly. For instance, there are four oxygen atoms.

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If you want to check your answer, just google the compound.

What is the molecular weight of H_3PO_4H_3PO_4?