Input interpretation
![bismuth iodide | molecular mass](../image_source/35fa94dccca6ef892da360ac13e6f8ea.png)
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](../image_source/73dd9d5c00f2a45e5cb8257827eb4625.png)
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)](../image_source/51b68692d2ab850b7bbba44ce3402308.png)
589.69381 Da (daltons)
![0.58969381 kDa (kilodaltons)](../image_source/bbaeec8ccc270e3976b8561b1a8dcf04.png)
0.58969381 kDa (kilodaltons)
![9.792096×10^-22 grams](../image_source/5862718a98e59a74e68fdcaa67ede4fa.png)
9.792096×10^-22 grams
![9.792096×10^-25 kg (kilograms)](../image_source/64cf478fcb60de80d4ddfab57e2fbc50.png)
9.792096×10^-25 kg (kilograms)
![589.7192 chemical atomic mass units (unit officially deprecated)](../image_source/b7a43dcc8223b8eb647a86b831df8b31.png)
589.7192 chemical atomic mass units (unit officially deprecated)
![589.8813 physical atomic mass units (unit officially deprecated)](../image_source/e19ef475e40b28c2655afb923b52ad4a.png)
589.8813 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
![≈ 0.82 × molecular mass of fullerene ( ≈ 721 u )](../image_source/7f36e261b01db4d3f26e20a420d46c69.png)
≈ 0.82 × molecular mass of fullerene ( ≈ 721 u )
![≈ 3 × molecular mass of caffeine ( ≈ 194 u )](../image_source/de564f64734ca7e47e0d0b649c495e40.png)
≈ 3 × molecular mass of caffeine ( ≈ 194 u )
![≈ 10 × molecular mass of sodium chloride ( ≈ 58 u )](../image_source/b725523dc38a352193af7564e6cec136.png)
≈ 10 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
![Relative atomic mass A_r from A_r = m_aN_A/M_u: | 590](../image_source/b6678c50c552a2d2f7c81f96e7b7c8f3.png)
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)](../image_source/c1e5c2f4eb84885e9b9bb1815b6dde88.png)
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](../image_source/efd0d8e1b00de7596624d8e171fd07e9.png)
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)](../image_source/3db0f703f165b0cb2d8a04374ca31fc6.png)
Molar mass M from M = m_mN_A: | 590 g/mol (grams per mole)