Input interpretation
4-ethoxy-3, 5-dimethylphenylboronic acid | molar mass
Result
Find the molar mass, M, for 4-ethoxy-3, 5-dimethylphenylboronic acid: 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_10H_15BO_3 Use the chemical formula, C_10H_15BO_3, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 10 O (oxygen) | 3 B (boron) | 1 H (hydrogen) | 15 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) | 10 | 12.011 O (oxygen) | 3 | 15.999 B (boron) | 1 | 10.81 H (hydrogen) | 15 | 1.008 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) | 10 | 12.011 | 10 × 12.011 = 120.110 O (oxygen) | 3 | 15.999 | 3 × 15.999 = 47.997 B (boron) | 1 | 10.81 | 1 × 10.81 = 10.81 H (hydrogen) | 15 | 1.008 | 15 × 1.008 = 15.120 M = 120.110 g/mol + 47.997 g/mol + 10.81 g/mol + 15.120 g/mol = 194.04 g/mol
Unit conversion
0.194 kg/mol (kilograms per mole)
Comparisons
≈ 0.27 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 0.9992 × molar mass of caffeine ( 194.191 g/mol )
≈ 3.3 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 3.2×10^-22 grams | 3.2×10^-25 kg (kilograms) | 194 u (unified atomic mass units) | 194 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 194