Question:
Assuming the atomic mass of H = 1, C = 12, N = 14, and O = 16, the molecular mass of a repeat unit of Nylon 6 fibre is \(\underline{\hspace{2cm}}\).
Assuming the atomic mass of H = 1, C = 12, N = 14, and O = 16, the molecular mass of a repeat unit of Nylon 6 fibre is \(\underline{\hspace{2cm}}\).
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To calculate the molecular mass, sum the atomic masses of the elements in the molecular formula. Be sure to use the correct number of atoms for each element.
Updated On: Jan 7, 2026
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Correct Answer: 113
Solution and Explanation
The repeat unit of Nylon 6 consists of one molecule of caprolactam, with the formula \( C_6H_{11}NO \). To calculate the molecular mass, we sum the atomic masses of each element in the formula, using the given atomic masses for hydrogen (H), carbon (C), nitrogen (N), and oxygen (O).
\[
\text{Molecular mass} = (6 \times 12) + (11 \times 1) + (1 \times 14) + (1 \times 16) = 72 + 11 + 14 + 16 = 113.
\]
Thus, the molecular mass of a repeat unit of Nylon 6 is \( 113 \).
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