Input interpretation
![phenol | molar mass](../image_source/cd42eb0f5b988960e2d273b249415d7c.png)
phenol | molar mass
Result
![Find the molar mass, M, for phenol: 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_5OH Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 H (hydrogen) | 6 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) | 6 | 12.011 H (hydrogen) | 6 | 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) | 6 | 12.011 | 6 × 12.011 = 72.066 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 72.066 g/mol + 6.048 g/mol + 15.999 g/mol = 94.113 g/mol](../image_source/e8aa29461eeef0d4e024f89616271e8a.png)
Find the molar mass, M, for phenol: 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_5OH Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 6 H (hydrogen) | 6 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) | 6 | 12.011 H (hydrogen) | 6 | 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) | 6 | 12.011 | 6 × 12.011 = 72.066 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 72.066 g/mol + 6.048 g/mol + 15.999 g/mol = 94.113 g/mol
Unit conversion
![0.09411 kg/mol (kilograms per mole)](../image_source/da80beed27f5f6f6fb4e35a31a4ed077.png)
0.09411 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.13 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/1594a9c3a61ff2be8792fbe4e19a68c6.png)
≈ ( 0.13 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.48 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/e21b9e21cea977bb658e0ab2aa61e5c0.png)
≈ 0.48 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.6 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/f8191e0e444014fe39e226553f3a1f47.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) | 94 u (unified atomic mass units) | 94 Da (daltons)](../image_source/98292a420b8dfe2f7d83453480aee557.png)
Mass of a molecule m from m = M/N_A: | 1.6×10^-22 grams | 1.6×10^-25 kg (kilograms) | 94 u (unified atomic mass units) | 94 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 94](../image_source/843a42f2f42c196a11d8d3bf83a466f9.png)
Relative molecular mass M_r from M_r = M_u/M: | 94