Question

what is mole what is the volume occupied by 1.2 mole of CO2 gas at STP​

Answer 1

Explanation:

Mole is actually a unit for measuring amount of microscopic entities in the world of chemistry like we frequently use moles of atoms/ions/molecules etc.

Thus, 1 mole of any substance (mostly used for pure substances ) == NA unit particles.

For Example, 1 mole of 0xygen will always contain NA molecules of 02 or say a mole of He will too contain NA He atoms

HOPE it's sufficient enough to understand the definition of the mole

Since 1 mole of gas occupies 22.4 L (old notation)/ 22.7 (new hence better notation) At STP

So, 1.2 moles would be occupying (1.2 × 22.4 )L or (1.2 × 22.7) L

ProTip from me : Use new notations in Chemistry to get Accurate answers provided it's a subjective problem

Thank you , all the very best !