Chemistry is a big problem when you have a teacher who won't teach
PLEASE help
1. How many molecules are in one mole of: glucose; C(6)H(12)O(6)?
2. Calculate the mass of one mole of: glucose; C(6)H(12)O(6)?
3. How many atoms are in one molecule of: glucose; C(6)H(12)O(6)?
all I know is that she wants us to use the conversion
1 mole = 6.0221367x10(23) molecules
I've been struggling with this for TOO long and my friends and parents are no help
any help or answers you can give me is great thanks
2007-01-15 12:42:31 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
I seriously hanging by a thread here in chemistry class
ANY HELP AT ALL
I'm thinking it may have a lot to do with conversions in to grams
???
2007-01-15 12:50:09 · update #1
thank you all so much, I gave everyone a thumbs up for helping
I wish I could pick all of you "best answer"
my teacher grades homework so this really helped me out thanks again
2007-01-15 13:06:25 · update #2
Avogadro's number tells you how many particles are in one gram mole of a substance. The particles can be atoms, ions or molecules.
The answer to #1 is simple. One mole of glucose has 6.02 x10E23 molecules (Avogadro's number.
The answer to number 2, is just add up the molecular mass of glucose as grams
carbon = 6 X 12 =72g
Hydrogen = 12 x 1 = 12g
Oxygen = 6 x 16 = 96g
Total = 180 grams
Questions #3 is also straight. Just count the number of atoms in the molecule
C = 6
H = 12
O = 6
Total is 24
2007-01-15 12:53:07 · answer #1 · answered by reb1240 7 · 1⤊ 0⤋
1. There are 6.0221367 x 10^23 molecules per mole.
2. Umm, roughly, it's:
6 (12 amu) + 12 (1 amu) + 6 (16 amu) = 180 amu = 180 g / mol
So one mole is roughly 180g. If you want a more precise number, use the atomic mass listed in the period table.
3. A molecule of glucose has 24 atoms, just adding up the numbers of 6 carbons, 12 hydrogens, and 6 oxygens.
2007-01-15 12:50:54 · answer #2 · answered by nazzyonenine 3 · 1⤊ 0⤋
When doing conversions like that, remember when converting from moles to molecules/atoms you always use 6.02 and 10 ^23, and when you are converting from moles to grams you use the molar mass of the element.
1)1 mol C(6)H(12)O(6) x 6.02 x10^23 molecules
_______________ = 6.02 x 10 ^23
1 mol
2) 1 mol C(6)H(12)O(6) x molar mass of C(6)H(12)O(6)
____________ = answer
1 mole
3) 1 molecule C(6)H(12)O(6) x 6.02 x 10^23 atoms
___________ = 6.02 x 10 ^23
1 molecule
It helps setting up the problems how i did. I am in apchem and this way makes the problems simpler and easier to understand.
Good Luck.
2007-01-15 13:02:42 · answer #3 · answered by concerned 2 · 1⤊ 0⤋
I am a little rusty, but doesn't the number behind the letter tell you how many molecules of each element is in one molecule of glucose so when you add them up.....6, 12,6=24 Check your book on this.
The mass I am not sure on.
2007-01-15 13:01:51 · answer #4 · answered by Carlene W 5 · 1⤊ 0⤋
Just remember - number of (atoms/molecules/particles) in a mole = Avogadro's constant
Mass of that mole in grams = mass (in amu) of (atom/molecule/particle) x Avogadro's constant
2007-01-15 12:53:41 · answer #5 · answered by Anonymous · 1⤊ 0⤋
1st question:
No.of molecule = no.of moles x avogadro number
No.of molecule = 1 X 6.023 X 10(23)
2nd question
mss = molecular mass X No.of moles
using clark's tables we found ouy molecular mass of glucose = 180
mass = 180 X 1
mass = 180
3rd Question
i couldn,t understand sorry. i gave two answers. please forgive me
2007-01-15 13:12:57 · answer #6 · answered by jhon peter 2 · 1⤊ 0⤋
OMG i dont no
2007-01-16 05:42:50 · answer #7 · answered by x-KittyKat-x 2 · 0⤊ 1⤋