Input interpretation
ethyl 3-(3, 4-dimethoxyphenyl)propionate | molar mass
Result
Find the molar mass, M, for ethyl 3-(3, 4-dimethoxyphenyl)propionate: 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_3O)_2C_6H_3CH_2CH_2CO_2C_2H_5 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 13 H (hydrogen) | 18 O (oxygen) | 4 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) | 13 | 12.011 H (hydrogen) | 18 | 1.008 O (oxygen) | 4 | 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) | 13 | 12.011 | 13 × 12.011 = 156.143 H (hydrogen) | 18 | 1.008 | 18 × 1.008 = 18.144 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 M = 156.143 g/mol + 18.144 g/mol + 63.996 g/mol = 238.283 g/mol
Unit conversion
0.23828 kg/mol (kilograms per mole)
Comparisons
≈ 0.33 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 1.2 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 4.1 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 4×10^-22 grams | 4×10^-25 kg (kilograms) | 238 u (unified atomic mass units) | 238 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 238