Volume Nitrogen Gas Question

mekran12 · #1 Nov 15, 2005, 05:13 AM

How would I solve this problem?

The decomposition of sodium azide (NaN[SIZE=2]3[/SIZE]) solid to sodium liquid and nitrogen gas is used in air bags. What volume of nitrogen gas measured at 725 mm of Hg and 26 degrees celsius is produced when 75 g of sodium azide (molar mass= 65.01 g/mol) decomposes?

kp2171 · Nov 20, 2005, 02:54 PM

two steps

write out the balanced chemical equation for the conversion of NaN3 to nitrogen gas and sodium. i won't do this for you, but you should be able to figure this out. make sure you balance the eq.

then use ideal gas law. PV = nRT ....so you are given P & T... R is a constant... and you can determine n by converting mass NaN3 to moles and then using the balanced equation to determine moles N2. Solve for V.

done.



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