Input interpretation
1, 2, 3, 4-tetraphenylnaphthalene | molar mass
Result
Find the molar mass, M, for 1, 2, 3, 4-tetraphenylnaphthalene: 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_10H_4(C_6H_5)_4 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 34 H (hydrogen) | 24 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) | 34 | 12.011 H (hydrogen) | 24 | 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) | 34 | 12.011 | 34 × 12.011 = 408.374 H (hydrogen) | 24 | 1.008 | 24 × 1.008 = 24.192 M = 408.374 g/mol + 24.192 g/mol = 432.566 g/mol
Unit conversion
0.43257 kg/mol (kilograms per mole)
Comparisons
≈ 0.6 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 2.2 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 7.4 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 7.2×10^-22 grams | 7.2×10^-25 kg (kilograms) | 433 u (unified atomic mass units) | 433 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 433