Input interpretation
![americium(III) iodide | molar mass](../image_source/ff0759cef3feae3b3f607f2b458e57d5.png)
americium(III) iodide | molar mass
Result
![Find the molar mass, M, for americium(III) iodide: 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: AmI_3 Use the chemical formula, AmI_3, to count the number of atoms, N_i, for each element: | N_i Am (americium) | 1 I (iodine) | 3 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) Am (americium) | 1 | 243 I (iodine) | 3 | 126.90447 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) Am (americium) | 1 | 243 | 1 × 243 = 243 I (iodine) | 3 | 126.90447 | 3 × 126.90447 = 380.71341 M = 243 g/mol + 380.71341 g/mol = 624 g/mol](../image_source/5f8cd6cc94ea6aa0a75af35c793da84f.png)
Find the molar mass, M, for americium(III) iodide: 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: AmI_3 Use the chemical formula, AmI_3, to count the number of atoms, N_i, for each element: | N_i Am (americium) | 1 I (iodine) | 3 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) Am (americium) | 1 | 243 I (iodine) | 3 | 126.90447 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) Am (americium) | 1 | 243 | 1 × 243 = 243 I (iodine) | 3 | 126.90447 | 3 × 126.90447 = 380.71341 M = 243 g/mol + 380.71341 g/mol = 624 g/mol
Unit conversion
![0.624 kg/mol (kilograms per mole)](../image_source/7c58d05337576d9cfecb6a41a13d8c3b.png)
0.624 kg/mol (kilograms per mole)
Comparisons
![≈ 0.87 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/8d7aa1ea57b63c9fd96fb46a3f2ed4d3.png)
≈ 0.87 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 3.2 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/398247bd83b178832913fad01b600786.png)
≈ 3.2 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 11 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/dab3a585d67daf4bff9b7e4e577f254f.png)
≈ 11 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1×10^-21 grams | 1×10^-24 kg (kilograms) | 624 u (unified atomic mass units) | 624 Da (daltons)](../image_source/d10e4b92a85c43b236b68274aae6fc2e.png)
Mass of a molecule m from m = M/N_A: | 1×10^-21 grams | 1×10^-24 kg (kilograms) | 624 u (unified atomic mass units) | 624 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 624](../image_source/20244bfb1daca0cae33dc49678222e0e.png)
Relative molecular mass M_r from M_r = M_u/M: | 624