2007-11-20 17:48:04 · 4 answers · asked by biffbifford@sbcglobal.net 1 in Science & Mathematics ➔ Chemistry
The previous answers are basically correct, but for a little more info: 12.011 grams of C is slightly more than one mol if it is only the C12 isotope and slightly less than one mol if it was pure C13 isotope. Assuming that your 12.011 g sample of carbon has the typical percentages of the naturally occurring isotopes of carbon then you have one mol. The atomic masses on the periodic table are a weighted average of the masses of the naturally occurring isotopes for that element.
2007-11-20 18:28:00 · answer #1 · answered by sa 2 · 0⤊ 0⤋
One mole of carbon has a mass o 12.011 grams. That is because the atomic mass of carbon is 12.011, and the definition of a mole (for elements) is: a mass in grams equal to the atomic mass.
2007-11-21 01:54:53 · answer #2 · answered by gp4rts 7 · 0⤊ 0⤋
There is 1.00moles of Carbon in 12.011 grams of Carbon. Its very simple. You start with the grams you have (12.011g) and you divide that by the molecular weight of the element (Carbon, which is 12.01). Calculate it and you come up with 1.00mol Very simple. Now if you wanted to know how many MOLECULES it had you simply multiply that number by Avogadro's Number (6.022 x 10^23)
2007-11-21 01:56:03 · answer #3 · answered by kk_jediknight 3 · 0⤊ 0⤋
number of moles = given amount / molar weight
since carbon has a molar weight of 12grams (approximate)
then:
moles= 12.011 / 12
= 1.000916667 moles of carbon
2007-11-21 02:32:05 · answer #4 · answered by greeK_god_HirYu 3 · 0⤊ 0⤋