Răspuns :
n=56/28=2 moli
n=N/NA
N=nxNA
N=2x6.022x10^23
N=12.044x10^23 atomi N
n=N/NA
N=nxNA
N=2x6.022x10^23
N=12.044x10^23 atomi N
m = 56 g
M = 2A N = 2 * 14 = 28 g/mol (masa moleculara)
Deci, avem 56 : 28 = 2 moli N2
Stim ca :
1 mol N2 .................. 6,023 * 10^23 atomi N2
2 moli N2 ................. x atomi N2
x = 2 * 6,023 * 10^23
x = 12,046 * 10^23 atomi N2
M = 2A N = 2 * 14 = 28 g/mol (masa moleculara)
Deci, avem 56 : 28 = 2 moli N2
Stim ca :
1 mol N2 .................. 6,023 * 10^23 atomi N2
2 moli N2 ................. x atomi N2
x = 2 * 6,023 * 10^23
x = 12,046 * 10^23 atomi N2