Input interpretation
![ytterbium(II) chloride | molar mass](../image_source/b650536290add367c9fb747d05c6f3c4.png)
ytterbium(II) chloride | molar mass
Result
![Find the molar mass, M, for ytterbium(II) 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: YbCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Yb (ytterbium) | 1 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) Cl (chlorine) | 2 | 35.45 Yb (ytterbium) | 1 | 173.045 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) Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 Yb (ytterbium) | 1 | 173.045 | 1 × 173.045 = 173.045 M = 70.90 g/mol + 173.045 g/mol = 243.95 g/mol](../image_source/498413d20f0df646eae8bcdf96f9307a.png)
Find the molar mass, M, for ytterbium(II) 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: YbCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Yb (ytterbium) | 1 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) Cl (chlorine) | 2 | 35.45 Yb (ytterbium) | 1 | 173.045 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) Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 Yb (ytterbium) | 1 | 173.045 | 1 × 173.045 = 173.045 M = 70.90 g/mol + 173.045 g/mol = 243.95 g/mol
Unit conversion
![0.24395 kg/mol (kilograms per mole)](../image_source/7008f88134a02c7e94df74f111ca9cba.png)
0.24395 kg/mol (kilograms per mole)
Comparisons
![≈ 0.34 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/0e3ea0bf820b04aa91649c8c3101e7c7.png)
≈ 0.34 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/a7303a235e561a8c21192fdd5d8eb139.png)
≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 4.2 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/3b45ca2eae5e42b71b73691ff80f3e55.png)
≈ 4.2 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.1×10^-22 grams | 4.1×10^-25 kg (kilograms) | 244 u (unified atomic mass units) | 244 Da (daltons)](../image_source/8d588c28380255989355835cd8290b09.png)
Mass of a molecule m from m = M/N_A: | 4.1×10^-22 grams | 4.1×10^-25 kg (kilograms) | 244 u (unified atomic mass units) | 244 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 244](../image_source/2fcc897de2d916f4bd0f6b8e091db780.png)
Relative molecular mass M_r from M_r = M_u/M: | 244