What is the mole in chemistry and what are some common household objects that have mole?
I really don't get what mole is actually. I get that is a measurement but other than that I'm confused. THANKS FOR YOUR HELP!!!!!!!!!!
4 Answers | Add Yours
As sure as a "dozen" is 12; a score is 20; a gross is 144; a MOLE is ALWAYS: 6.02 X 10^23. A mole of eggs is 6.02X10^23 eggs. Different Moles have different masses but always the same number. (12 eggs does not weigh the same as 12 apples; but 12=12!)
In the micro-world of science and God-Particle search "one" is usually TOO SMALL to play with and a bucket with a mole of atomic units is big enough to play with. So most scientists play with moles of units NOT single units.
To underscore this; take an egg out of a carton (containing a dozen; in a store) and try to buy it at the check out counter!
Most students of science can't even immagine taking one atom out of a beaker (containing a mole; in a science lab) and trying to show it to the teacher! You can see a beaker full; but, you can not see one (with the naked eye.)
The mole is a number 6.23*10^23. The number is also called Avogadro number. It is also the number molecules in a gram molecular or gram atomic substance . To determine number of moles of a substance involved in a compound, we calculate the ratio of mass/gram molecular weight in stoichemistry.
Avogadro , the Italian scientist, who established the a gas law , now called by his name that equal volume of gases under equal temperature and pressure has the same number of molecules.Using this concept he arrived at this Avogadro number that 22.41 litre of any ideal gas contain 6.022*10^23 number of molecules or Avogadro number of molecules.
Presently , the mole is taken as the number of molecules in 22.4 litre of ideal gas at STP or the number of atoms in 12 gram of carbon-12 isotope.
1mole of iron has mass of 55.85 gm, 1 mole of Aluminium ha 26.98 gm and 1 mole of water 18 gm.
Mole is a unit of measurement of mass, which is used primarily in chemistry. Mass of any substance such as an element, compound, or a radical can be measured using mole. For example, we can measure mass of many household material such as salt, sugar, and water in terms of mole. However I am not sure if mass of substances like ketchup, which is really a mixture of many ingredients, can be measured in terms of moles. IN any case I have not come across any incidents of quantity of household objects being measured in moles.
Mole is the mass in grams of a pure substance that contains same number of chemical units as there are number of atoms in 12 grams of Carbon-12.
The chemical units mentioned in the above definition could be molecules, atoms, ions, elections or other similar particles. The number of particles in one mole of substance is approximately 6.021367 x 10^23.
There is a fairly widely believed misconception that mole is a number. In reality, mole is a measure of mass only. For example, we define density as the mass of one cubic centimeter of a substance, but that does not make density a measure of volume - for the same volume if one cubic centimeter the density of different material changes. Similarly for the same number of particles, the mole of different substances changes.
We’ve answered 319,859 questions. We can answer yours, too.Ask a question