Input interpretation
![ytterbium(II) fluoride | molar mass](../image_source/ccb50087045cf91c7b7e44c5ac835ff8.png)
ytterbium(II) fluoride | molar mass
Result
![Find the molar mass, M, for ytterbium(II) fluoride: 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: YbF_2 Use the chemical formula, YbF_2, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 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) F (fluorine) | 2 | 18.998403163 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) F (fluorine) | 2 | 18.998403163 | 2 × 18.998403163 = 37.996806326 Yb (ytterbium) | 1 | 173.045 | 1 × 173.045 = 173.045 M = 37.996806326 g/mol + 173.045 g/mol = 211.042 g/mol](../image_source/db9ba0b212f0952adc20a12e6c8def89.png)
Find the molar mass, M, for ytterbium(II) fluoride: 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: YbF_2 Use the chemical formula, YbF_2, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 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) F (fluorine) | 2 | 18.998403163 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) F (fluorine) | 2 | 18.998403163 | 2 × 18.998403163 = 37.996806326 Yb (ytterbium) | 1 | 173.045 | 1 × 173.045 = 173.045 M = 37.996806326 g/mol + 173.045 g/mol = 211.042 g/mol
Unit conversion
![0.211042 kg/mol (kilograms per mole)](../image_source/1d17e5d4ee7ffebc1466b5151acbc4fd.png)
0.211042 kg/mol (kilograms per mole)
Comparisons
![≈ 0.29 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/a329b38948f9abcd0721e8aa4944c7ba.png)
≈ 0.29 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.1 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/819d454b379ece99472c25442b1cc8d7.png)
≈ 1.1 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 3.6 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/d64956e676a194922c51494fba5e5b48.png)
≈ 3.6 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 3.5×10^-22 grams | 3.5×10^-25 kg (kilograms) | 211 u (unified atomic mass units) | 211 Da (daltons)](../image_source/8ff357881cb37a802c85049c9ac4d9c5.png)
Mass of a molecule m from m = M/N_A: | 3.5×10^-22 grams | 3.5×10^-25 kg (kilograms) | 211 u (unified atomic mass units) | 211 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 211](../image_source/7f862a96d995a119866e681f998b04d3.png)
Relative molecular mass M_r from M_r = M_u/M: | 211