Input interpretation
![potassium ferrate(VI) | molar mass](../image_source/2d8ac2da30c8384c30adaf1dd3dd4548.png)
potassium ferrate(VI) | molar mass
Result
![Find the molar mass, M, for potassium ferrate(VI): 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_2FeO_4 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Fe (iron) | 1 K (potassium) | 1 O (oxygen) | 2 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) Fe (iron) | 1 | 55.845 K (potassium) | 1 | 39.0983 O (oxygen) | 2 | 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) Fe (iron) | 1 | 55.845 | 1 × 55.845 = 55.845 K (potassium) | 1 | 39.0983 | 1 × 39.0983 = 39.0983 O (oxygen) | 2 | 15.999 | 2 × 15.999 = 31.998 M = 55.845 g/mol + 39.0983 g/mol + 31.998 g/mol = 126.941 g/mol](../image_source/69cafefb76bb00a0baabc066e4a9a3e8.png)
Find the molar mass, M, for potassium ferrate(VI): 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_2FeO_4 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Fe (iron) | 1 K (potassium) | 1 O (oxygen) | 2 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) Fe (iron) | 1 | 55.845 K (potassium) | 1 | 39.0983 O (oxygen) | 2 | 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) Fe (iron) | 1 | 55.845 | 1 × 55.845 = 55.845 K (potassium) | 1 | 39.0983 | 1 × 39.0983 = 39.0983 O (oxygen) | 2 | 15.999 | 2 × 15.999 = 31.998 M = 55.845 g/mol + 39.0983 g/mol + 31.998 g/mol = 126.941 g/mol
Unit conversion
![0.12694 kg/mol (kilograms per mole)](../image_source/ea88a186932fbebce29126de2742f9c5.png)
0.12694 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.18 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/91b6cf08f03d5b8fc0f84051d1c601bf.png)
≈ ( 0.18 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.65 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/5db8550b06e6a59d50388b479a5112fc.png)
≈ 0.65 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2.2 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/949aa645676afa6d6807d0ca8db5a87c.png)
≈ 2.2 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2.1×10^-22 grams | 2.1×10^-25 kg (kilograms) | 127 u (unified atomic mass units) | 127 Da (daltons)](../image_source/88f72c13a816f432739794bfcb5a164b.png)
Mass of a molecule m from m = M/N_A: | 2.1×10^-22 grams | 2.1×10^-25 kg (kilograms) | 127 u (unified atomic mass units) | 127 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 127](../image_source/8bd8382710736ea982def760a62a8d89.png)
Relative molecular mass M_r from M_r = M_u/M: | 127