# What is the molar mass of calcium hydroxide?

Well, you should look that up and tell me. Isn't it $\text{74.093 g/mol}$?
${M}_{C a {\left(O H\right)}_{2}} = {M}_{C a} + 2 \left[{M}_{O} + {M}_{H}\right]$
= "40.078 g/mol" + 2["15.999 g/mol" + "1.0079 g/mol"] = ???