Question

what is the molar mass of this compound? ca(oh)₂ remember to round to the hundredths place from the periodic table. 34.02 g/mol 74.00 g/mol 57.09 g/mol 74.10 g/mol

Explanation:

Step1: Find molar mass of each element

From periodic table:

• Molar mass of \(Ca\) (\(M_{Ca}\)) = \(40.08\ g/mol\)
• Molar mass of \(O\) (\(M_{O}\)) = \(16.00\ g/mol\)
• Molar mass of \(H\) (\(M_{H}\)) = \(1.01\ g/mol\)

Step2: Calculate molar mass of \(Ca(OH)_{2}\)

\(M = M_{Ca}+2\times(M_{O}+M_{H})\)
\(M = 40.08+2\times(16.00 + 1.01)\)
\(M = 40.08+2\times17.01\)
\(M = 40.08 + 34.02\)
\(M = 74.10\ g/mol\)

Answer:

\(74.10\ g/mol\)