Homework Help: college chemistry

Posted by Ana g on Sunday, April 15, 2012 at 10:59pm.

Lithium metal decomposes in water and releases hydrogen gas. if 275 ml of hydrogen gas is produced at stp. what is the mass of lithium that reacted ? Li(s)+H2O(l)=LiOH(aq)+H2(g)

college chemistry - DrBob222, Sunday, April 15, 2012 at 11:38pm
Convert 275 mL H2 gas at STP to mols.
275/22,400 = ??
Use the coefficients to convert mols H2 to mols Li.
Then g Li = mols Li x atomic mass Li.

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