Input interpretation
![mercuric chloride | molecular mass](../image_source/bd9abd9920069d5fd97d927b4414622f.png)
mercuric chloride | molecular mass
Result
![Find the molecular mass, m, for mercuric chloride: 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: HgCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Hg (mercury) | 1 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 Cl (chlorine) | 2 | 35.45 Hg (mercury) | 1 | 200.592 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 Hg (mercury) | 1 | 200.592 | 1 × 200.592 = 200.592 m = 70.90 u + 200.592 u = 271.49 u](../image_source/1f3db002f4679bbf71ea91ff1cc96bd8.png)
Find the molecular mass, m, for mercuric chloride: 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: HgCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Hg (mercury) | 1 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 Cl (chlorine) | 2 | 35.45 Hg (mercury) | 1 | 200.592 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 Hg (mercury) | 1 | 200.592 | 1 × 200.592 = 200.592 m = 70.90 u + 200.592 u = 271.49 u
Unit conversions
![271.49 Da (daltons)](../image_source/d64fb70e2d1b7ea0117b9faff66cf74b.png)
271.49 Da (daltons)
![0.27149 kDa (kilodaltons)](../image_source/165ef33cf2481daf3f79544b9da8398c.png)
0.27149 kDa (kilodaltons)
![4.508×10^-22 grams](../image_source/74aaab32e1ed48408ac16dff46729d23.png)
4.508×10^-22 grams
![4.508×10^-25 kg (kilograms)](../image_source/2e69eb366a65b9bacb8b4f0a26e87bdc.png)
4.508×10^-25 kg (kilograms)
![271.5 chemical atomic mass units (unit officially deprecated)](../image_source/88a61022ef2dfc2d6917bcb0545d5d3e.png)
271.5 chemical atomic mass units (unit officially deprecated)
![271.58 physical atomic mass units (unit officially deprecated)](../image_source/7e05d93881fe7f49a6965d53b566d45a.png)
271.58 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
![≈ 0.38 × molecular mass of fullerene ( ≈ 721 u )](../image_source/4fe508763c5ff0e25080abb2848c1c5d.png)
≈ 0.38 × molecular mass of fullerene ( ≈ 721 u )
![≈ 1.4 × molecular mass of caffeine ( ≈ 194 u )](../image_source/bc3a6b99b770169072d1d01e487dd062.png)
≈ 1.4 × molecular mass of caffeine ( ≈ 194 u )
![≈ 4.6 × molecular mass of sodium chloride ( ≈ 58 u )](../image_source/8fbeae00db79a211ab4328cd3d85ac5c.png)
≈ 4.6 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
![Relative atomic mass A_r from A_r = m_aN_A/M_u: | 271](../image_source/67b9ff1799e8e6d70abec6c99a65ca35.png)
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 271
![Molar mass M from M = m_aN_A: | 271 g/mol (grams per mole)](../image_source/f3d00cc751dce86aed56255f49a45a74.png)
Molar mass M from M = m_aN_A: | 271 g/mol (grams per mole)
![Relative molecular mass M_r from M_r = m_mN_A/M_u: | 271](../image_source/c2d14d03f9a8da06be580ae502209b7c.png)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 271
![Molar mass M from M = m_mN_A: | 271 g/mol (grams per mole)](../image_source/55fe3724c552af23e1e0ffed37419587.png)
Molar mass M from M = m_mN_A: | 271 g/mol (grams per mole)