Input interpretation
![1-heptanol | molar mass](../image_source/02c5a117f687614e9b16d48cfede66dc.png)
1-heptanol | molar mass
Result
![Find the molar mass, M, for 1-heptanol: 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: CH_3(CH_2)_6OH Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 H (hydrogen) | 16 O (oxygen) | 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) C (carbon) | 7 | 12.011 H (hydrogen) | 16 | 1.008 O (oxygen) | 1 | 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) C (carbon) | 7 | 12.011 | 7 × 12.011 = 84.077 H (hydrogen) | 16 | 1.008 | 16 × 1.008 = 16.128 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 84.077 g/mol + 16.128 g/mol + 15.999 g/mol = 116.204 g/mol](../image_source/60435adbc5b00f5fe193cbf15aa95124.png)
Find the molar mass, M, for 1-heptanol: 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: CH_3(CH_2)_6OH Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 H (hydrogen) | 16 O (oxygen) | 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) C (carbon) | 7 | 12.011 H (hydrogen) | 16 | 1.008 O (oxygen) | 1 | 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) C (carbon) | 7 | 12.011 | 7 × 12.011 = 84.077 H (hydrogen) | 16 | 1.008 | 16 × 1.008 = 16.128 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 84.077 g/mol + 16.128 g/mol + 15.999 g/mol = 116.204 g/mol
Unit conversion
![0.1162 kg/mol (kilograms per mole)](../image_source/f69f00fba8ffdab8faadd823a7de3998.png)
0.1162 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/25e60b8432ecc966b0b20aa0e41dd833.png)
≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.6 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/a0846d5d72ad9098bf353f6a477118cc.png)
≈ 0.6 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/ee78317071f5a84ba0b6e9eeadde26d8.png)
≈ 2 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.9×10^-22 grams | 1.9×10^-25 kg (kilograms) | 116 u (unified atomic mass units) | 116 Da (daltons)](../image_source/40464497e42c5a0c3f6039826c409a8a.png)
Mass of a molecule m from m = M/N_A: | 1.9×10^-22 grams | 1.9×10^-25 kg (kilograms) | 116 u (unified atomic mass units) | 116 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 116](../image_source/defad17713ee2a27503a50668016f42d.png)
Relative molecular mass M_r from M_r = M_u/M: | 116