Question

what is mole concept? calculate the number of molecules in 45g of water. in 60 words

Answer 1

As of 2011, the mole is defined by International Bureau of Weights and Measures to be the amount of substance of a system which contains the same number of constitutive entities (e.g. atoms, molecules, ions, electrons, photons) as atoms in 0.012 kilograms of carbon-12 (12C), the isotope of carbon with standard atomic ...

Answer 2

First you have to know about avagadro no.