can anyone teach me exactly about mole concept?

Question

plz tell memore about mole concept.i m in great urgency.tanx
tom

Answer 1

A mole of something is equal to avogadro's number of particles of that thing. Avogadro's number is roughly 6.02 x 10^23 (6.02 times 10 to the 23rd power).

In chemistry, if you have an element who's atomic number is, say 12 (carbon), then 12 grams of it is 1 mole or 6.02x10^23 atoms of it.

You could use simple algebra then to figure out how many atoms were in, say, 1 gram, or 10 grams, or 50kg of the substance.

An example on Wikipedia shows sugar which is C12H22O16. C has an atomic # of 12, H has 1, and O has 11.

So 12 * 12 + 22*1 + 16*11 = 342, the total atomic # for this sugar.

So in 342 grams of sugar would contain 6.02x10^23 molecules.

Note that moles can be applied to other particles too like electrons, ions, etc.

Answer 2

A mole is a way to measure the molecular weight of a substance. You add up the weight of all of the atoms in a molecule. For example, table sugar (sucrose) is made of 12 atoms of carbon, 22 atoms of hydrogen, and 12 atoms of oxygen. Carbon itself has a weight of 12- look at a periodic table. Hydrogen has a weight of 1, and oxygen has a weight of 16. So 1 mole of sucrose is 342 grams. I got that by 12(12) + 22(1) + 16(12) = 342.
A mole of one substance will have exactly as many molecules as a mole of any other substance.

Answer 3

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Answer 4

Mole concept :
Mole is basically a unit of measurement
1 mole = 6.023 X 10 (to the power ) 23

Answer 5

mole is a unit used for measureing the amount of substance by figuring out the number of particles in an amount of matter.

1mole of any substance has 6.02*10^23 particles.
e.g 1 mole of salt ( NaCl) contains 6.02*10^23 NaCl molecules.
since one Na combines with one Cl their numbers are also equal.
thus there are 6.02*10^23 Na atoms and the same number of Cl atoms too.

It is imortant to notice that
6.02*10^23 Na atoms + 6.02*10^23 Cl atoms = 6.02*10^23 NaCl molecules.

check the above equations with small numbers for better understanding

e.g 2
in H2O (water) number of hydrogen atoms is twice that of the oxygen atoms.

it means 1 mole of water contains 6.02*10^23 H2O molecules.

and hence it contains 2(6.02*10^23) H atoms and 6.02*10*23 O atoms. note it contains 6.02*10^23 H2 ( hydrogen molecules)

1 mole of any substance is equal to the molecular mass or atomic mass of that substance in grams.
e.g

the atomic mass of oxygen is 16
thus 16g of oxygen is 1 mole of oxygen.

the molecular mass of NaCl is 24+35.5 = 59.5

thus 59.5g of NaCl is 1mole of NaCl

Answer 6

It's a messurement unit which means 6.02*10^23. It has no units. It's just like a dozen means 12.