A linear polyamide is formed by the condensation polymerisation of 120 molecules of 4-aminobutanoic acid, H2N(CH2)3COOH\text{H}_2\text{N(CH}_2)_3\text{COOH}H2N(CH2)3COOH. What is the relative molecular mass, MrM_rMr, of the resulting polyamide? (Use the following relative atomic masses: H=1.0\text{H} = 1.0H=1.0, C=12.0\text{C} = 12.0C=12.0, N=14.0\text{N} = 14.0N=14.0, O=16.0\text{O} = 16.0O=16.0)
