## Materials Science and Engineering: An Introduction

$m= 100.12 g/mol$
Required: Compute repeat unit molecular weights for poly(methyl methacrylate) Solution: From Table 14.3, each repeat unit consists of 5 carbons, 8 hydrogens and 2 oxygens. $A_{C}, A_{H},$ and $A_{O}$ represent the atomic weights of carbon, hydrogen and oxygen, respectively. $m = 5(A_{C}) + 8(A_{H}) + 2(A_{O}) = 5(12.011 g/mol) + 8(1.008 g/mol) + 2(16.00 g/mol)= 100.12 g/mol$