Input interpretation
bismuth iodide | molecular mass
Result
Find the molecular mass, m, for bismuth iodide: 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: BiI_3 Use the chemical formula, BiI_3, to count the number of atoms, N_i, for each element: | N_i Bi (bismuth) | 1 I (iodine) | 3 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u Bi (bismuth) | 1 | 208.98040 I (iodine) | 3 | 126.90447 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u Bi (bismuth) | 1 | 208.98040 | 1 × 208.98040 = 208.98040 I (iodine) | 3 | 126.90447 | 3 × 126.90447 = 380.71341 m = 208.98040 u + 380.71341 u = 589.69381 u
Unit conversions
589.69381 Da (daltons)
0.58969381 kDa (kilodaltons)
9.792096×10^-22 grams
9.792096×10^-25 kg (kilograms)
589.7192 chemical atomic mass units (unit officially deprecated)
589.8813 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
≈ 0.82 × molecular mass of fullerene ( ≈ 721 u )
≈ 3 × molecular mass of caffeine ( ≈ 194 u )
≈ 10 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 590
Molar mass M from M = m_aN_A: | 590 g/mol (grams per mole)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 590
Molar mass M from M = m_mN_A: | 590 g/mol (grams per mole)