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Mole is a unit of concentration in SI; a mole is equal to the molecular mass of a compound.
Miller McLaughlin
Wiki User
∙ 11y agoA very large number of objects
Raphsody Keyes
Wiki User
∙ 13y agoIn Chemistry, we measure things in u(unified mass), but this is really really really small. It is not a practical way to talk about things. (I mean, do you know what 3 u's looks like, cuz i don't) A man named Avogadro came up with a better system. He discovered how many atoms it takes to convert u's to grams. This way you can work with larger amounts than only a few atoms. It turns out that exactly 6.022 x 10 ^23 atoms will convert u's to grams.
So, let's first understand u's. These values are unique for each atom, molecule, compound etc.... For atoms, the magnitude (value) can be found on the Periodic Table. For example Cl is 35.45 u.
In context(questions):
1. How many ATOMS are in one mole of Chlorine? This is tricky only because there is extra information. A mole of any substance has the same number of atoms (6.022 x 10 ^23), because it is the conversion. The number of atoms in a mole doesn't ever change.
2. How many GRAMS ar in 2 moles of Chlorine? 70.90 grams. One mole contains 35.45, so two moles is twice that number, 70.90.
3. How many moles are in 90.0 grams of Cl? approx. 2.54 moles. This is backwards from the last question. Take the 90.0 grams and divide it by the number of grams in one mole (35.45).
My suggestion to you is that you should use conversion factors. If you can successfully do this you won't even have to understand why you are doing what you are doing. (Note: make sure you understand conversion factors first. The units must cancel. Any con. factor can be flipped)
Some useful conversion factors:
1 mole/ 6.022 x 10 ^23 atoms
#(off of periodic table)/ 1 mole
#in U's = # in grams so #in u /# grams
ECT..
Good Luck. This is a tough topic for a lot of Chemistry students.
Wiki User
∙ 16y agomole, in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02×1023 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules. The term mole is often used in place of gram-molecular weight; e.g., one speaks of 18 grams of water as one mole of water rather than as one gram-molecular weight of water. The mole is a unit in the International System of Units (SI).
Source: http://www.answers.com/mole+?gwp=11&ver=2.3.0.609&method=3
Wiki User
∙ 16y agoThe mole is a unit that measure the amount of a substance. One mole is equal to 6.022E23 atoms.
Wiki User
∙ 16y agomole, in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02
Wiki User
∙ 14y agoA mole in chemistry is a unit of measurement that tells us the quantity of a substance,
6 x 1023 atoms make up one mole
Wiki User
∙ 10y agoThe mole of a substance is equivalent to the amount of this substance which contain as many molecules (or atoms or ions) as in 12 grams of carbon-12.
Wiki User
∙ 9y agoA mole is a unit of measurement in Chemistry that measures large quantities of very small entities such as atoms, molecules, or other specified particles.
Wiki User
∙ 7y agoThe mole is the ratio between the mass of a sample and the molar mass of this compound.
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In chemistry The symbol m in 2.0m stands for?
its stands for molesm = metersmol or mole = mole
What is National Chemistry Awareness day called?
Mole Day
What best describes a mole used in chemistry?
The term "mole" is the same as the term "dozen", except that the mole represents a much greater number. Whereas "a dozen eggs" means 12 eggs, "1 mole of eggs" means 6.03x1023 eggs. The reason for using such a large number is that there are typically huge numbers of molecules involved in any chemical reaction in Chemistry.
The mole concept is important in chemistry because?
Atoms and molecules are very small and the mole concept allows us to count atoms and molecules by weighing macroscopic amounts of material.
What is a mole atom?
A mole, in terms of chemistry usually, represents a number. That number is about 6.022 x 10^23. So when you have a mole of something, you have 6.022 x 10^23 of something. Moles are used in chemisty because the mass of a mole of any molecule in grams is the same as the atomic mass of the molecule in amu's.
How can chemistry mole can be used?
in chemistry
What is a name for a mole in chemistry?
avogador
What is a mole used in chemistry as?
Mole is a unit of concentration in SI; a mole is equal to the molecular mass of a compound.
Where do you use chemical mole?
its a unit in chemistry
In chemistry The symbol m in 2.0m stands for?
its stands for molesm = metersmol or mole = mole
What is National Chemistry Awareness day called?
Mole Day
What are the 3 definitions of mole?
Mole can refer to a small burrowing creatue, a sauce forund in Spanish cooking, or a chemistry term.
What types of chemistry does pharmacy use?
Quantities and quantities, the mole, composition and biochemistry
What does mole stand for?
a mole stands for like that black thing on ur skin and can some times have hair. or it can be n animal Unless you are talking about the mole unit that is in chemistry... which is 6 x 1023
How is mole being used in chemistry class?
Yes. A mole is 6.022 x 1023 of anything, such as atoms, molecules, ions, or even people, trees, or cars. The number of the mole is known as Avogadro's number.
What is a mole cule?
A mole is a small mammal or a unit measure in Chemistry, cule means small. I'll assume you mean "molecule" which is a group of bonded elements.
What best describes a mole used in chemistry?
The term "mole" is the same as the term "dozen", except that the mole represents a much greater number. Whereas "a dozen eggs" means 12 eggs, "1 mole of eggs" means 6.03x1023 eggs. The reason for using such a large number is that there are typically huge numbers of molecules involved in any chemical reaction in Chemistry.
