Input interpretation
cyclohexane, 1, 1'-(1, 5-pentanediyl)bis- | molar mass
Result
Find the molar mass, M, for cyclohexane, 1, 1'-(1, 5-pentanediyl)bis-: M = sum _iN_im_i Plan: • Write the chemical formula and gather atomic masses from the periodic table. • Determine values for N_i and m_i using these items. • Finally, compute the mass. Write the chemical formula: C_17H_32 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 17 H (hydrogen) | 32 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | N_i | m_i/g·mol^(-1) C (carbon) | 17 | 12.011 H (hydrogen) | 32 | 1.008 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 17 | 12.011 | 17 × 12.011 = 204.187 H (hydrogen) | 32 | 1.008 | 32 × 1.008 = 32.256 M = 204.187 g/mol + 32.256 g/mol = 236.443 g/mol
Unit conversion
0.23644 kg/mol (kilograms per mole)
Comparisons
≈ 0.33 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 1.2 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 4 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 3.9×10^-22 grams | 3.9×10^-25 kg (kilograms) | 236 u (unified atomic mass units) | 236 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 236