Answer:
The number of molecules is 3,01E23 of N2
Explanation:
We use the formula PV=nRT, and STP: 1 atm of pressure and 273 K of temperature.
PV=nRT ---> n=PV/RT
n= 1 atm x 11,2 l /0,082 l atm/ Kmol x 273K
n= 0, 5 mol
We use the number of Avogadro:
1 mol---------6, 02E23 molecules
0,5 mol----- x= (0,5 mol x6, 02E23 molecules)/ 1 mol = 3,01E23
