Question

how many grams of Oxygen gas contain Avogadro's number of molecules?

Answer 1

O2 is the chemical formula of Oxygen

We know ,

1 mole of a substance contains 6.022×10^23

Here, Molar mass of O = 16u

And molar mass of O2 = 32u

And 32g of O2 = 1 mole of O2

Therefore 32g of O2 has molecules = 6.022×10^23

Since 1 molecule of O2 has 2 atoms

Therefore 32g of O2 has atoms=2*6.02×10^23.

Answer 2

32 grams of oxygen gas contains avogadro no of molecules