Input interpretation
![magnesium fluoride | molar mass](../image_source/2867b7f64cf58fed4a7a1e690124c0b6.png)
magnesium fluoride | molar mass
Result
![Find the molar mass, M, for magnesium 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: MgF_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 Mg (magnesium) | 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 Mg (magnesium) | 1 | 24.305 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 Mg (magnesium) | 1 | 24.305 | 1 × 24.305 = 24.305 M = 37.996806326 g/mol + 24.305 g/mol = 62.302 g/mol](../image_source/c1523a888e8471de6c639a1d45aa7a49.png)
Find the molar mass, M, for magnesium 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: MgF_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 Mg (magnesium) | 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 Mg (magnesium) | 1 | 24.305 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 Mg (magnesium) | 1 | 24.305 | 1 × 24.305 = 24.305 M = 37.996806326 g/mol + 24.305 g/mol = 62.302 g/mol
Unit conversion
![0.062302 kg/mol (kilograms per mole)](../image_source/e23770f6ba8a40bbc29387eded33aba1.png)
0.062302 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.086 ≈ 1/12 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/8d673273a5169706d81b51fb65e90f99.png)
≈ ( 0.086 ≈ 1/12 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.32 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/07602f46214a77ebb1c7f3594fe9afae.png)
≈ 0.32 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.1 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/27fad11fba95fc7b0ead8ea64fcc192d.png)
≈ 1.1 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1×10^-22 grams | 1×10^-25 kg (kilograms) | 62 u (unified atomic mass units) | 62 Da (daltons)](../image_source/3e1b2ced3de17e43fd8bdf6ad41f2137.png)
Mass of a molecule m from m = M/N_A: | 1×10^-22 grams | 1×10^-25 kg (kilograms) | 62 u (unified atomic mass units) | 62 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 62](../image_source/55579639953d02b7286b607ed9309a2c.png)
Relative molecular mass M_r from M_r = M_u/M: | 62