Input interpretation
![calcium chloride | molar mass](../image_source/e5ce8555e030779faadb143782c69b96.png)
calcium chloride | molar mass
Result
![Find the molar mass, M, for calcium chloride: 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: CaCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 Cl (chlorine) | 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 Cl (chlorine) | 2 | 35.45 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 M = 40.078 g/mol + 70.90 g/mol = 110.98 g/mol](../image_source/554b8c2e6aebe5ee53b79eb36d2a2468.png)
Find the molar mass, M, for calcium chloride: 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: CaCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 Cl (chlorine) | 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 Cl (chlorine) | 2 | 35.45 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 M = 40.078 g/mol + 70.90 g/mol = 110.98 g/mol
Unit conversion
![0.111 kg/mol (kilograms per mole)](../image_source/f152bc1902388ff5a59736bf53080741.png)
0.111 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.15 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/25ae625773a92692d8679e10907fe1ad.png)
≈ ( 0.15 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.57 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/0ab12431c403795dad41dda3a7004877.png)
≈ 0.57 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.9 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/8e9daf197c49ebccacc84046317819f2.png)
≈ 1.9 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.8×10^-22 grams | 1.8×10^-25 kg (kilograms) | 111 u (unified atomic mass units) | 111 Da (daltons)](../image_source/0d5f8aebf0aa76641fc5c99f6b4aa661.png)
Mass of a molecule m from m = M/N_A: | 1.8×10^-22 grams | 1.8×10^-25 kg (kilograms) | 111 u (unified atomic mass units) | 111 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 111](../image_source/4df4be475d210fd219e23e347f297b81.png)
Relative molecular mass M_r from M_r = M_u/M: | 111