Question

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

Answer 1

$M_{H_2O}=2*A_H+A_O=2+16=18\ g/mol \\ \\ M_{O_2}= 2*A_O=2*16=32\ g/mol\\ \\ M_{H_2}= 2*A_H=2\ g/mol\\ \\ M_{Cl_2}= 2*A_{Cl}=2*35.5=71\ g/mol\\ \\ M_{NaClO}= A_{Na}+A_{Cl}+A_{O}=23+35.5+16=74.5\ g/mol\\ \\ M_{CO_2}= A_C+2*A_O=12+32=44\ g/mol\\ \\ M_{H_2CO_3}= 2*A_H+A_C+3*A_O=2+12+48=62\ g/mol\\ \\ M_{Ca}= A_{Ca}=40\ g/mol\\ \\ M_{CaCO_3}= A_{Ca}+A_C+3*A_O=40+12+48=100\ g/mol$

$M_{NaCl}= A_{Na}+A_{Cl}=23+35.5=58.5\ g/mol\\ \\ M_{CaO}= A_{Ca}+A_O=40+16=56\ g/mol\\ \\ M_{Ca(OH)_2}= A_{Ca}+2*(A_O+A_H)=40+34=74\ g/mol\\ \\ M_{NaOH}=A_{Na}+A_O+A_H=23+16+1=40\ g/mol$