Homework Help: Chemistry

Posted by mysterychicken on Saturday, October 23, 2010 at 9:57am.

I still don't understand how to do this problem; grams/molar mass I understand, but I need to see the steps CLEARLY.

43. How many moles are in 25.0 grams of potassium? Show your work and round your answer to the appropriate number of significant figures.

Please, please help with this!
Thanks
-MC

Chemistry - bobpursley, Saturday, October 23, 2010 at 10:33am
a mole of any chemical is its atomic or molecular mass in grams.

a mole of K is 39.0983 grma

Moles of K in 25 g= 25/39.0983
Chemistry - sned, Saturday, October 23, 2010 at 10:53pm
hey mysterychicken i think we go to the same school :) i have the exact same history questions on my tests.

send me an email, we could prolly help eachother out. seanned2009 at gmail

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