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September 5, 2015

Homework Help: Chemistry

Posted by Sam on Saturday, July 24, 2010 at 4:36am.

What is the formula mass of ammonium phosphide, (NHsubscript4)subscript3P?
85.0 u
49.0 u
48.0 u
57.0 u

I thought I was to look these up in the Periodic Table, but they aren't there, so I'm confused on what to do. Any help would be appreciated.

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