Input interpretation
![cupric sulfide | molar mass](../image_source/701f7b5d829728c4dbf2af1c41cf1861.png)
cupric sulfide | molar mass
Result
![Find the molar mass, M, for cupric sulfide: 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: CuS Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cu (copper) | 1 S (sulfur) | 1 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) Cu (copper) | 1 | 63.546 S (sulfur) | 1 | 32.06 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) Cu (copper) | 1 | 63.546 | 1 × 63.546 = 63.546 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 63.546 g/mol + 32.06 g/mol = 95.61 g/mol](../image_source/33464c42c2bc31015bec909b9bfc3cf0.png)
Find the molar mass, M, for cupric sulfide: 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: CuS Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cu (copper) | 1 S (sulfur) | 1 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) Cu (copper) | 1 | 63.546 S (sulfur) | 1 | 32.06 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) Cu (copper) | 1 | 63.546 | 1 × 63.546 = 63.546 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 63.546 g/mol + 32.06 g/mol = 95.61 g/mol
Unit conversion
![0.09561 kg/mol (kilograms per mole)](../image_source/6b84c997615620bf1b7bf23f3675c808.png)
0.09561 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.13 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/397062dfd26913f7f84356c4060220f8.png)
≈ ( 0.13 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.49 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/05f52ad2e17afc5e112e1d03f80da771.png)
≈ 0.49 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.6 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/329f19f647dfcb1bb2a78d35450f55c5.png)
≈ 1.6 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.6×10^-22 grams | 1.6×10^-25 kg (kilograms) | 96 u (unified atomic mass units) | 96 Da (daltons)](../image_source/b5aa3c8b7637d69d22789e6117ff8cc8.png)
Mass of a molecule m from m = M/N_A: | 1.6×10^-22 grams | 1.6×10^-25 kg (kilograms) | 96 u (unified atomic mass units) | 96 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 96](../image_source/418fb1966aeba58b6180187545b7357b.png)
Relative molecular mass M_r from M_r = M_u/M: | 96