Input interpretation
![osmium(IV) fluoride | molar mass](../image_source/f4c32cac4cfc41ced736a711446aaa0a.png)
osmium(IV) fluoride | molar mass
Result
![Find the molar mass, M, for osmium(IV) 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: OsF_4 Use the chemical formula, OsF_4, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 4 Os (osmium) | 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) | 4 | 18.998403163 Os (osmium) | 1 | 190.23 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) | 4 | 18.998403163 | 4 × 18.998403163 = 75.993612652 Os (osmium) | 1 | 190.23 | 1 × 190.23 = 190.23 M = 75.993612652 g/mol + 190.23 g/mol = 266.22 g/mol](../image_source/72b793d148d66574915316ec88079fab.png)
Find the molar mass, M, for osmium(IV) 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: OsF_4 Use the chemical formula, OsF_4, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 4 Os (osmium) | 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) | 4 | 18.998403163 Os (osmium) | 1 | 190.23 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) | 4 | 18.998403163 | 4 × 18.998403163 = 75.993612652 Os (osmium) | 1 | 190.23 | 1 × 190.23 = 190.23 M = 75.993612652 g/mol + 190.23 g/mol = 266.22 g/mol
Unit conversion
![0.26622 kg/mol (kilograms per mole)](../image_source/ff2c1f42aa6941d2843b229a06254a94.png)
0.26622 kg/mol (kilograms per mole)
Comparisons
![≈ 0.37 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/42039d98fc643a8b7aaf83410ab54d9c.png)
≈ 0.37 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.4 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/a2f2708d62f426f86aa34057438484ab.png)
≈ 1.4 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 4.6 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/bdd8808040db56c102dc13e4a4decc95.png)
≈ 4.6 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.4×10^-22 grams | 4.4×10^-25 kg (kilograms) | 266 u (unified atomic mass units) | 266 Da (daltons)](../image_source/69788a7b6d0d8f2d1aa08d7d3d426636.png)
Mass of a molecule m from m = M/N_A: | 4.4×10^-22 grams | 4.4×10^-25 kg (kilograms) | 266 u (unified atomic mass units) | 266 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 266](../image_source/af44de430c2e0516a5b6c59c75ab27f9.png)
Relative molecular mass M_r from M_r = M_u/M: | 266