Input interpretation
![potassium hexacyanoferrate(III) | molar mass](../image_source/aea7d3c4f724049efaf2a7e229e8161d.png)
potassium hexacyanoferrate(III) | molar mass
Result
![Find the molar mass, M, for potassium hexacyanoferrate(III): 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: K_3Fe(CN)_6 Use the chemical formula, K_3Fe(CN)_6, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 Fe (iron) | 1 K (potassium) | 3 N (nitrogen) | 6 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) | 1 | 55.845 K (potassium) | 3 | 39.0983 N (nitrogen) | 6 | 14.007 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) | 1 | 55.845 | 1 × 55.845 = 55.845 K (potassium) | 3 | 39.0983 | 3 × 39.0983 = 117.2949 N (nitrogen) | 6 | 14.007 | 6 × 14.007 = 84.042 M = 72.066 g/mol + 55.845 g/mol + 117.2949 g/mol + 84.042 g/mol = 329.248 g/mol](../image_source/ea724318e3e10c40961be0eb661fdcef.png)
Find the molar mass, M, for potassium hexacyanoferrate(III): 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: K_3Fe(CN)_6 Use the chemical formula, K_3Fe(CN)_6, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 Fe (iron) | 1 K (potassium) | 3 N (nitrogen) | 6 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) | 1 | 55.845 K (potassium) | 3 | 39.0983 N (nitrogen) | 6 | 14.007 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) | 1 | 55.845 | 1 × 55.845 = 55.845 K (potassium) | 3 | 39.0983 | 3 × 39.0983 = 117.2949 N (nitrogen) | 6 | 14.007 | 6 × 14.007 = 84.042 M = 72.066 g/mol + 55.845 g/mol + 117.2949 g/mol + 84.042 g/mol = 329.248 g/mol
Unit conversion
![0.32925 kg/mol (kilograms per mole)](../image_source/be2d52980b1d26b4191bba68506291e0.png)
0.32925 kg/mol (kilograms per mole)
Comparisons
![≈ 0.46 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/928bbec9baa1e9fc0d3608e8d7ecb782.png)
≈ 0.46 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.7 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/eba0ca73176912989883da7df39415db.png)
≈ 1.7 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5.6 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/0a0ff5e1a84987624e17b5641c4ee14b.png)
≈ 5.6 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 5.5×10^-22 grams | 5.5×10^-25 kg (kilograms) | 329 u (unified atomic mass units) | 329 Da (daltons)](../image_source/9b283b1fd0719e8ec00e5ebcabe08319.png)
Mass of a molecule m from m = M/N_A: | 5.5×10^-22 grams | 5.5×10^-25 kg (kilograms) | 329 u (unified atomic mass units) | 329 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 329](../image_source/2ef5aeac8da5830a2da4d6ce05b24256.png)
Relative molecular mass M_r from M_r = M_u/M: | 329