Input interpretation
buckminsterfullerene | molar mass
Result
Find the molar mass, M, for buckminsterfullerene: 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_60 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 60 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) | 60 | 12.011 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) | 60 | 12.011 | 60 × 12.011 = 720.660 M = 720.660 g/mol
Unit conversion
0.72066 kg/mol (kilograms per mole)
Comparisons
≈ 3.7 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 12 × molar mass of sodium chloride ( ≈ 58 g/mol )
≈ 40 × molar mass of water ( ≈ 18 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 1.2×10^-21 grams | 1.2×10^-24 kg (kilograms) | 721 u (unified atomic mass units) | 721 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 721