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Off-Topic Discussion => General Discussion => Topic started by: Locutus of Borg on October 23, 2009, 02:13:29 pm

Title: HAPPY MOLE DAY!!!!!
Post by: Locutus of Borg on October 23, 2009, 02:13:29 pm: HAPPY MOLE DAY (10/23)

6.02 * 10^23 Watermelon Seeds: Would be found inside a melon slightly larger than the moon.

6.02 * 10^23 Donut Holes: Would cover the earth and be 5 miles (8 km) deep.

6.02 * 10^23 Pennies: Would make at least 7 stacks that would reach the moon.

6.02 * 10^23 Grains of Sand: Would be more than all of the sand on Miami Beach.

6.02 * 10^23 Blood Cells: Would be more than the total number of blood cells found in every human on earth.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Aardwolf on October 23, 2009, 02:21:32 pm: Coooool
Title: Re: HAPPY MOLE DAY!!!!!
Post by: stuart133 on October 23, 2009, 02:23:54 pm: And in atoms is only a few hundred grammes at most.

Also do you think that someone should enlighten those who do not get this.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Blue Lion on October 23, 2009, 02:25:00 pm: We already had this thread

http://www.hard-light.net/forums/index.php?topic=66239.0
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Aardwolf on October 23, 2009, 02:27:27 pm: Quote from: stuart133 on October 23, 2009, 02:23:54 pm
And in atoms is only a few hundred grammes at most.

Also do you think that someone should enlighten those who do not get this.

1 gram = 1 mole of carbon 12
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Scotty on October 24, 2009, 07:20:00 am: 1 gram = 1 mole of Hydrogen. 1 mole of Carbon 12 is 12 grams.

Basically, 6.02 x 10²³ is called Avogadro's Number. It is the number of atoms that combined totals that element's atomic weight in grams.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Mongoose on October 24, 2009, 12:17:55 pm: Quote from: Scotty on October 24, 2009, 07:20:00 am
1 gram = 1 mole of Hydrogen. 1 mole of Carbon 12 is 12 grams.
One mole of hydrogen is really something more like 1.01 grams. The standard is actually based on carbon; i.e., one mole of carbon-12 is precisely 12 grams.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: stuart133 on October 24, 2009, 01:23:59 pm: Quote from: Mongoose on October 24, 2009, 12:17:55 pm
Quote from: Scotty on October 24, 2009, 07:20:00 am
1 gram = 1 mole of Hydrogen. 1 mole of Carbon 12 is 12 grams.
One mole of hydrogen is really something more like 1.01 grams. The standard is actually based on carbon; i.e., one mole of carbon-12 is precisely 12 grams.

Now there is someone who knows his chemistry.
Also if anyone is interested the reason for this is that there are different isotopes of Hydrogen. The normal one weighs 1, the heavier ones weigh 2 and 3. (That is relative atomic mass) The RAM of an element takes into account these isotopes, and their relative abundances.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Mongoose on October 24, 2009, 01:25:27 pm: I don't know how well I know it, but when you take two classes in high school and one in college, that little "1.01" on the periodic table that you have to keep plugging into your calculator tends to stick with you. :p
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Scotty on October 24, 2009, 01:39:56 pm: It's really 1.0097, but who's counting? :P That little blip is because the mass of one mole accounts for isotopes that may be found in the sample. The overwhelming majority of Hydrogen masses only 1, but there is enough Hydrogen-2 and -3 to throw it off by the smallest amount. We generally measure from Carbon-12 because it is very prevalent in applications of science, and a convenient mark to measure from.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Ford Prefect on October 24, 2009, 01:45:48 pm: This thread just made me very nostalgic for all the times I cheated hardcore in high school chemistry.
Title: Re: HAPPY MOLE DAY!!!!!
Post by: Pred the Penguin on October 25, 2009, 03:05:30 am: How large would be said donut holes?