i dont understand it at all and i have to do a project figuring how many moles of something it takes to go around the earth or something like that but i don't understand what im supposed to do at all and im about to cry...haha its annoying i hate this!
2006-11-23 08:49:35 · 6 answers · asked by gradin_2007 1 in Science & Mathematics ➔ Chemistry
OK - chemists are basically lazy (that's why we use symbols for elements and formulas for compounds; we don't really like to write that much.)
The mole is a shortened way to indicate a really big number.
If I said to you, 1 dozen, you would know I am talking about 12 of something (doesn't matter what, its still 12).
If I said to you, 1 pair, you would know I am talking about 2 of someting (doesn't matter what, its still 2)
If I said to you, 1 mole, you would know I am talking about
602200000000000000000000 of something (doesn't matter what, its still that much.) This is usually written as 6.022 x 10(23)
because we are not about to keep track of all those zeroes. If I told you your allowance was 1 mole of dollars you would be very rich because you would have 6.022 x 10(23) dollars. (Remember me in your will).
Atoms are too small to see so we have to work with A LOT of them and everyone has agreed on a "standard" number of atoms, 1 moles worth, also called "Avogadro's number". You could have less than that (0.5 moles, 0.456 moles) or more (10 moles, 540 moles etc.) but the "standard" for comparison is 1 mole.
So, for your project, figure out how many "whatevers" it takes to go around the world and then divide that number by 6.022 x 10(23) and you will know how many moles of your "whatever" you need.
2006-11-24 08:15:47 · answer #1 · answered by The Old Professor 5 · 0⤊ 0⤋
A mole is 6.02 X 10^23 atoms or molecules. 6.02 X 10^23 is Avogadro's number. For any element of compound, 1 mole is also equal to the atomic weight or the molecular weight. Water (H2O) has a molecular weight of 18. One mole of water has a mass of 18 grams and contains 6.02 X 10^23 molecules. I hope this helps.
2006-11-23 09:44:00 · answer #2 · answered by xox_bass_player_xox 6 · 0⤊ 0⤋
A mole of something has N molecules of that something in it. N is Avogadro's number, 6.022*10^23. A mole of something has a weight in grams equal to the molecular weight of the substance. If the subtance is a gas at standard T&P, one mole of it occupies a volume of 22.4L.
2006-11-23 08:58:29 · answer #3 · answered by Steve 7 · 0⤊ 0⤋
Safely & Permanently Remove Moles, Warts and Skin Blemishes
2016-05-16 06:31:39 · answer #4 · answered by ? 4 · 0⤊ 0⤋
look when we r dealing with things like atoms and molecules it's is hard for us to think about a weight of one atom because it is really really really small so scientist said :
1 mole is 6.022*10^23 atoms or molecules.....
2006-11-23 08:55:57 · answer #5 · answered by Anonymous · 0⤊ 0⤋
mole short for molecule....
2006-11-23 08:50:24 · answer #6 · answered by Anonymous · 0⤊ 3⤋