Answer :
[tex]Ca(OH)_2[/tex]
[tex]MM=Molar~mass[/tex]
[tex]MM_{Ca(OH)_2}=MM_{Ca}+2*(MM_O+MM_H)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+2*(16.0+1.01)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+2*(17.01)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+34.02[/tex]
[tex]\boxed{\boxed{MM_{Ca(OH)_2}=74.1~g/mol}}[/tex]
[tex]MM=Molar~mass[/tex]
[tex]MM_{Ca(OH)_2}=MM_{Ca}+2*(MM_O+MM_H)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+2*(16.0+1.01)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+2*(17.01)[/tex]
[tex]MM_{Ca(OH)_2}=40.08+34.02[/tex]
[tex]\boxed{\boxed{MM_{Ca(OH)_2}=74.1~g/mol}}[/tex]