Question

since,

O here is an oxygen atom and resembles 1 oxygen atom

then,

1 oxygen atom = 1 mole of oxygen = Gram Atomic Massof oxygen = avogadro no.

but , how 1 oxygen atom = avogadro no.

Answer 1

O is the symbol of oxygen element and represents 1 mole atoms of oxygen.

Now, 1 mole = Avogadro’s number.

Therefore, number of oxygen atoms in O = Avogadro’s number = 6.022 x 10²³