How do you read a mole in chemistry?
If you want to know how many moles of a material you have, divide the mass of the material by its molar mass. The molar mass of a substance is the mass in grams of one mole of that substance. This mass is given by the atomic weight of the chemical unit that makes up that substance in atomic mass units (amu).
What do you mean by mole concept explain with example?
Mole is defined as the amount of the substance containing the same number of discrete entities (atoms, molecules, ions, etc) as there are atoms in a sample of pure 12C weighing exactly 12g.
Why is mole concept so confusing?
The number of grams in a mole is different from substance to substance. If you’re like most students, it’s this that’s confusing you. … Similarly, a mole of oxygen gas has a different weight than a mole of water- but in each case, you have 6.02×1023 molecules.
How do I calculate moles?
The mole represents a quantity of substance, but relates to the number of atoms or molecules rather than mass or volume. Specifically, 1 mole represents 6.022 x 10^23 atoms or molecules of substance. You calculate the number of moles by dividing the mass of substance by the substance’s atomic or molecular weight.
Why is a mole 6.02 X10 23?
Originally, a mole was the quantity of anything that has the same number of particles found in 12.000 grams of carbon-12. That number of particles is Avogadro’s Number, which is roughly 6.02×1023. A mole of carbon atoms is 6.02×1023 carbon atoms.
What is Mole concept class 9th?
In a chemical reaction equation,it is more convenient to use quantity of substance in number of its molecules or atoms rather than their masses,so we use a new unit called MOLE. If we weigh an element equal to its atomic mass in grams,then it contains 6.022×1023 atoms of the element.
How do you calculate moles in Class 9?
Solution: The number of moles (n ) = Given number of particles (N) / Avogadro number (N). = 4 moles. Solution: Number of atoms (n) = Given mass (m) / Molar mass (M) x Avogadro number (N).
What do you understand by the term mole in 11th standard?
A mole is defined as that amount of substance which contains Avogadro’s number of atoms if the substance is atomic or Avogadro’s number of molecules if the substance is molecular. … 1 mole of carbon atoms = 6.022 ×1023 atoms of carbon.
Why is the mole like a dozen?
A mole is similar to a dozen, because both are words used to describe a specific number of countable things.
Are moles equal to grams?
The mass of 1 mole of a substance is equal to its relative atomic or molecular mass in grams.