Question

calculati masele moleculare pentru urmatoarele substanțe: hidroxid de magneziu,
oxid de aluminiu,
sulfura de natriu,
azotat de potasiu,
sulfat de cupru.

Answer 1

M Mg(OH)2=24+16*2+1*2=58 g/mol
M Al2O3=27*2+16*3=102 g/mol
M Na2SO4=23*2+32+16*4=142 g/mol
M KNO3=39+14+16*3=101 g/mol
M CuSO4=64+32+16*4=160 g/mol