Question

what is mole concept?

Answer 1

The mole is the amount of a substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12; its symbol is "mol."
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Answer 2

the mole is the amount of the substance of a system which contains as many elementary entities as there are atoms in o.o12 kg of carbon -12 ; its symbol is "mol"