Input interpretation
![benzyl cyanide | molar mass](../image_source/2b4f7f92510195001d96d8c4dd38cb92.png)
benzyl cyanide | molar mass
Result
![Find the molar mass, M, for benzyl cyanide: 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: C_6H_5CH_2CN Use the chemical formula, C_6H_5CH_2CN, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 8 H (hydrogen) | 7 N (nitrogen) | 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) | 8 | 12.011 H (hydrogen) | 7 | 1.008 N (nitrogen) | 1 | 14.007 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) | 8 | 12.011 | 8 × 12.011 = 96.088 H (hydrogen) | 7 | 1.008 | 7 × 1.008 = 7.056 N (nitrogen) | 1 | 14.007 | 1 × 14.007 = 14.007 M = 96.088 g/mol + 7.056 g/mol + 14.007 g/mol = 117.151 g/mol](../image_source/e1b043d0f7d1eef194e6b524cc3f1957.png)
Find the molar mass, M, for benzyl cyanide: 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: C_6H_5CH_2CN Use the chemical formula, C_6H_5CH_2CN, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 8 H (hydrogen) | 7 N (nitrogen) | 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) | 8 | 12.011 H (hydrogen) | 7 | 1.008 N (nitrogen) | 1 | 14.007 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) | 8 | 12.011 | 8 × 12.011 = 96.088 H (hydrogen) | 7 | 1.008 | 7 × 1.008 = 7.056 N (nitrogen) | 1 | 14.007 | 1 × 14.007 = 14.007 M = 96.088 g/mol + 7.056 g/mol + 14.007 g/mol = 117.151 g/mol
Unit conversion
![0.11715 kg/mol (kilograms per mole)](../image_source/d15e6aac5d59e3d7ddee4ac0eb52530b.png)
0.11715 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/e387ac279e7061a061c5493b958996eb.png)
≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.6 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/1eb52e281de5a5730ccac644cab281fe.png)
≈ 0.6 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/ae22c0669324d3bdd516b33330bb9f73.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) | 117 u (unified atomic mass units) | 117 Da (daltons)](../image_source/f02e9d0a2b0b82625b7787b05d3f0653.png)
Mass of a molecule m from m = M/N_A: | 1.9×10^-22 grams | 1.9×10^-25 kg (kilograms) | 117 u (unified atomic mass units) | 117 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 117](../image_source/e993110912044a5361d7bf1ff03d3e4b.png)
Relative molecular mass M_r from M_r = M_u/M: | 117