Question

what do you mean bye mole concepts

Answer 1

✔️ When elements and compounds take part in chemical reactions it is there atoms and molecules that react with each other and therefore it is necessary to know the number of the atoms and molecules. However while carrying out a chemical reaction it, is convenient to measure out quantities that can be handled Instead of counting the number of atoms and molecules the concept of mole is useful for this purpose
✔️ A mole is the quantity of substance whose mass in grams is equal in magnitude to the molecular mass of that substance in Daltons.Thus the molecular mass of oxygen is 32 u, and therefore 32 gram oxygen is one mole of Oxygen. The molecular mass of water is 18u therefore 18 gram of water make one mole of water.

✔️ Number of moles= Mass of substance in grm
Of a substance upon
Molecular mass of substance