Homework Help: Chemistry

Posted by Lauren on Tuesday, October 23, 2007 at 10:06pm.

An aqueous solution of ammonium nitrate NH4NO2 decomposeds when heated to give off nitrogen.
This reaction may be used to prepare pure nitrogen. How many grams of ammonium nitrite must have reacted if 3.75dm^3 of nitrogen gas was collected over water at 26 degrees C and 97.8 kPa?

Same with this one can some one help me start it out. please

Chemistry - DrBob222, Tuesday, October 23, 2007 at 10:33pm
Write the equation and balance it.
Convert 3.75 dm^3 to L. Convert kPa to atm. Use PV = nRT and solve for n. Convert mols N2 to mols NH4NO3 and that to grams.

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