Input interpretation
![iron(III) oxalate | molar mass](../image_source/59bab3b5133519eeda55adc11985398a.png)
iron(III) oxalate | molar mass
Result
![Find the molar mass, M, for iron(III) oxalate: 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: Fe_2(C_2O_4)_3 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 Fe (iron) | 2 O (oxygen) | 12 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) C (carbon) | 6 | 12.011 Fe (iron) | 2 | 55.845 O (oxygen) | 12 | 15.999 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) C (carbon) | 6 | 12.011 | 6 × 12.011 = 72.066 Fe (iron) | 2 | 55.845 | 2 × 55.845 = 111.690 O (oxygen) | 12 | 15.999 | 12 × 15.999 = 191.988 M = 72.066 g/mol + 111.690 g/mol + 191.988 g/mol = 375.744 g/mol](../image_source/3de1e75c9af4e928244567c27d0a2bfd.png)
Find the molar mass, M, for iron(III) oxalate: 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: Fe_2(C_2O_4)_3 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 Fe (iron) | 2 O (oxygen) | 12 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) C (carbon) | 6 | 12.011 Fe (iron) | 2 | 55.845 O (oxygen) | 12 | 15.999 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) C (carbon) | 6 | 12.011 | 6 × 12.011 = 72.066 Fe (iron) | 2 | 55.845 | 2 × 55.845 = 111.690 O (oxygen) | 12 | 15.999 | 12 × 15.999 = 191.988 M = 72.066 g/mol + 111.690 g/mol + 191.988 g/mol = 375.744 g/mol
Unit conversion
![0.37574 kg/mol (kilograms per mole)](../image_source/a27bee6579b7bc1b56e2384bf1499cd9.png)
0.37574 kg/mol (kilograms per mole)
Comparisons
![≈ 0.52 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/b62536dd0770efb34c4a08128dce4226.png)
≈ 0.52 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.9 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/f6c10aa35ead232e9417f79e21eea890.png)
≈ 1.9 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 6.4 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/b9d4d0aecc34d4f902150b4e24a22e0c.png)
≈ 6.4 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 6.2×10^-22 grams | 6.2×10^-25 kg (kilograms) | 376 u (unified atomic mass units) | 376 Da (daltons)](../image_source/a64e0a722c4cbfbe2735ac0e95363012.png)
Mass of a molecule m from m = M/N_A: | 6.2×10^-22 grams | 6.2×10^-25 kg (kilograms) | 376 u (unified atomic mass units) | 376 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 376](../image_source/67b991336622cbdf235d66851b748529.png)
Relative molecular mass M_r from M_r = M_u/M: | 376