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HELP! I need some help with science, quick!
sphetr2:
Good evening, BYOAC friends! I am doing a lab the night before. It's a stoichiometry lab. In the materials it says
0.5M lead(II) nitrate, Pb(NO3)2
0.5M sodium iodide, NaI
What unit does the M represent? Please hurry! Thanks!
boykster:
in chemistry, M usually stands for a Mole
http://en.wikipedia.org/wiki/Mole_(unit)
USSEnterprise:
IIRC, and correct me if I'm wrong, but one mole of an element is equal to it's atomic mass in grams
i.e. One mole of Helium is approximately 4 grams.
sphetr2:
--- Quote from: USSEnterprise on March 21, 2007, 09:38:48 pm ---IIRC, and correct me if I'm wrong, but one mole of an element is equal to it's atomic mass in grams
i.e. One mole of Helium is approximately 4 grams.
--- End quote ---
That is its molar mass, actually. A mole of a substance is 6.02e23 of its representative particles.
--- Quote from: boykster on March 21, 2007, 09:07:04 pm ---in chemistry, M usually stands for a Mole
http://en.wikipedia.org/wiki/Mole_(unit)
--- End quote ---
Thanks, that helps. We usually use 'mol' in chemistry for some reason.
whammoed:
capital M is molarity:
http://en.wikipedia.org/wiki/Molarity#Molarity
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