thanks<3
2007-10-27 12:25:47 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Biology
what does mole mean?
2007-10-27 12:36:56 · update #1
It means grams per mole where 1 mole equals Avogadro's Number which is:
6.22 x 10^23, this is the number of atoms in one molecule.
2007-10-27 12:40:45 · answer #1 · answered by younghoopsta23 2 · 2⤊ 2⤋
A mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram (or 12 grams) of carbon-12, where the carbon-12 atoms are unbound, at rest and in their ground state. The number of atoms in 0.012 kilogram of carbon-12 is known as the Avogadro constant, and is determined empirically. The currently accepted value is 6.02214179(30)×1023 mol-1
Number of moles = (# of grams) / (molar mass)
Number of grams = (# of moles) * (molar mass)
Here are a two examples:
Example 1:
How many moles are in 5 grams of O2?
The molar mass of O2 = 16.00 g/mole x 2 (for 2 atoms of oxygen) or 32.00 g/mole.
5 g of O2 / (32 g/mole) = 0.15625 moles
Example 2:
How many grams does 4 moles of NH3 weigh?
The molar mass of NH3 = 14.01 + (3 * 1.01) = 17.04 g/mole
4 moles * 17.04 g/mole = 68.16 grams
2007-10-27 13:41:54 · answer #2 · answered by ? 5 · 3⤊ 0⤋
Grams per mole
2007-10-27 12:32:48 · answer #3 · answered by T.H. 2 · 1⤊ 0⤋
It's grams per mole.
Finding the number of moles in a substance is a way of expressing its molecular weight.
2007-10-27 13:20:56 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Grams per mole.
2007-10-27 12:33:29 · answer #5 · answered by Darkskinnyboy 6 · 0⤊ 0⤋
Grams per mole, this is the molecular weight of a compound measured in grams.
2007-10-27 12:36:20 · answer #6 · answered by milton b 7 · 0⤊ 0⤋
mass in grams per mole
2007-10-27 12:30:01 · answer #7 · answered by CPUcate 6 · 1⤊ 0⤋
grams per mole
2007-10-27 12:29:06 · answer #8 · answered by gardengallivant 7 · 1⤊ 0⤋
grammes per mole, that is, were are talking about molar mass.
want to know more about this unit ant its meaning?:
http://en.wikipedia.org/wiki/Mole_%28unit%29
2007-10-27 12:35:22 · answer #9 · answered by Anonymous · 0⤊ 0⤋
green mole
2007-10-27 12:49:27 · answer #10 · answered by Ty 2 · 0⤊ 1⤋