Question

CALCULATE THE NUMBER OF MOLES AND MOLECULES OF AMMONIA (NH3) GAS IN VOLUME 67.2DM3 OF IT MEASURED AT STP​

Answer 1

3 moles and 18.066 × 10²³ molecules

Explanation:

At STP

1 mole of a gas has a volume of 22.4 L

and 1 mole = 6.022 × 10²³

∴ 67.2 L of NH₃ = 67.2/22.4

                          = 3 moles

Number of molecules = 3 × 6.022 × 10²³

                                    = 18.066 × 10²³  

Answer 2

Explanation:

calculate the number of moles & molecules of ammonia (NH3) gas in volume 67.2 dm3 of it measured at stp