Question

Masele Molare la : H2O , O2 , H2 , Cl2 , NaClO , CO2 , H2CO3 , Ca , CaCo3 , NaCl , CaO , Ca (OH)2 , NaOH .

Answer 1

H2O = 2x1 + 16 = 18 g/mol

O2 = 2x16 = 32 g/mol

H2 = 2x1 = 2g/mol

Cl2 = 2x35.5 = 71 g/mol

NaClO = 23 + 35.5 + 16 = 74.5 g/mol

CO2 = 12 + 2x16 =  44 g/mol

H2CO3 = 2x1 + 12 + 3x16 =  62 g/mol

Ca = 40 g/mol

CaCO3 = 40 + 12 + 3x16 = 100 g/mol

NaCl = 23 + 35.5 = 58.5 g/mol

CaO = 40 + 16 = 56 g/mol

Ca(OH)2 = 40 + 2x16 + 2x1 = 74 g/mol

NaOH = 23 + 16 + 1 = 40 g/mol

A(H) = 1 ; A(O) = 16 ; A(C) = 12, A( Na) = 23 ; A(Ca) = 40 ; A(Cl) = 35.5