Question

(a) Define the term mole. (b) If 1 g of carbon contains x atoms, what will be the number of atoms

Answer 1

1 g of carbon = 1/12 mole of carbon atoms.

No we have atoms in 1/12 mole of carbon atoms.

A mole represents a specific number of particle of a particular entity (atoms, molecules, ions etc)

Thus one twelfth mole of magnesium will also contain x atoms.

We need o find how man moles are in 1 g of magnesium and corresponding o a how man atoms i contains.

Molar mass of magnesium is 24 g, so 1 g of Mg is equal o 1/24 moles of magnesium atoms.

Now 1/12 mole contains x atoms.

A mole corresponds to the mass of a substance that contains 6.023 x 10^23 particles of the substance. The mole is the SI unit for the amount of a substance and its symbol is mol.

so 1 mole would contain 12x atoms.

And finally 1/24 mole contains 12x * 1/24 atoms = x/2 atoms.