Input interpretation
![calcium iodide | molar mass](../image_source/c23fed583bbdac5870f85b17f6e2983a.png)
calcium iodide | molar mass
Result
![Find the molar mass, M, for calcium 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: CaI_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 I (iodine) | 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) Ca (calcium) | 1 | 40.078 I (iodine) | 2 | 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) Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 I (iodine) | 2 | 126.90447 | 2 × 126.90447 = 253.80894 M = 40.078 g/mol + 253.80894 g/mol = 293.887 g/mol](../image_source/3596467c38423be29392cd0f2a4cb44c.png)
Find the molar mass, M, for calcium 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: CaI_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 I (iodine) | 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) Ca (calcium) | 1 | 40.078 I (iodine) | 2 | 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) Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 I (iodine) | 2 | 126.90447 | 2 × 126.90447 = 253.80894 M = 40.078 g/mol + 253.80894 g/mol = 293.887 g/mol
Unit conversion
![0.293887 kg/mol (kilograms per mole)](../image_source/1ce80c85091259b68c75cdb4f34012e2.png)
0.293887 kg/mol (kilograms per mole)
Comparisons
![≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/b6acb382d3f9a77089c0974488a2af82.png)
≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/0b2dcc34bdc042cdb7b80f516af65d37.png)
≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/af21d869559a32eeed3611abbcdac4f6.png)
≈ 5 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.9×10^-22 grams | 4.9×10^-25 kg (kilograms) | 294 u (unified atomic mass units) | 294 Da (daltons)](../image_source/571e1580b4ec5ab1e8488cc4f8933a26.png)
Mass of a molecule m from m = M/N_A: | 4.9×10^-22 grams | 4.9×10^-25 kg (kilograms) | 294 u (unified atomic mass units) | 294 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 294](../image_source/d02f9decb24cd73b6e13d1fe0fa0e7a6.png)
Relative molecular mass M_r from M_r = M_u/M: | 294