How many moles of NaOH are needed to produce 145.0 moles of Na2SO4?
How many moles of H2SO4 are needed to produce 10.0 moles of H2O?

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

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