Question

1 mole is the amount of substance that contain as many elementary particles carbon12 isotope of carbon. (a).What do you mean by molar mass of a compound?
(b). Calculate the number of moles of 1 litre of water? [density of water is 1 g/ml also calculator the number of water molecules in 1 litre of water]​

Answer 1

Answer:

The chemical changes observed in any reaction involve the rearrangement of billions of atoms. It is impractical to try to count or visualize all these atoms, but scientists need some way to refer to the entire quantity. They also need a way to compare these numbers and relate them to the weights of the substances, which they can measure and observe. The solution is the concept of the mole, which is very important in quantitative chemistry.