=din unitatea de masura a masei molare ,g/mol. se deduce ca 1mol substanta are o masa M
=iar daca substanta este gazoasa, Vm=22,4l/mol. ceea ce inseamna ca 1mol gaz are volumul 22,4l
=N,A=6,023X10²³particule/mol, ceea ce inseamna ca 1mol din orice substanta contine N,A particule(molecule, sau atomi, sau ioni)
1. 1mol NH3........(14gN+3X1gH)
3mol.................................x=m=3x17 g=........................
2 .1mol gaz......22,4l
x.....................44,8 l
x=m= 2mol
1mol Cl2............2x35,5g
2mol..................x= m= 4x35,5g=.........................
3, 1mol molecule....contine N,A=6,023x10²³molec
0,5mol......................................x=N= 3,0115X10²³molecule
Finalizeaza calculele !!!!