Question

AJUTOR am evaluare la chimie si nu stiu nimic
Dau coroana dau de toate

Answer 1

Răspuns:

M,O3=3X16g/mol=48g/mol

1mol.molec.......32g

1,5mol.................x= m= 1,5x32g=

A,Mg=24g/mol

1mol atomi............24g

1,5mol....................x= 1,5x24g=

M,F2=2x19g/mol=38g/mol

1molmolec...........38g

1,5mol...................x=m=1,5x38g=

M,H3PO4=(3X1+31+4X16)g/mol= 98g/mol

1mol molec...........................98g

1,5mol................................x= m=1,5x98g=

M,Cu(no3)2= (64 +2x14+6x16)g/mol=188g/mol

1mol molec...........188g

1,5mol......................x=m=1,5x188g=

M,Al2O3=(2X27+3X16(g/mol=102g/mol

1mol molec.............102g

1,5mol...................x=m=1,5x102g=

deci, se poate aplica formula

m= niu(mol)xM(g/mol)      si trebuie sa calculezi masa molara, folosind datele din sistemul periodic

Explicație: