Input interpretation
2, 4-dimethylstyrene | molar mass
Result
Find the molar mass, M, for 2, 4-dimethylstyrene: 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)_2C_6H_3CH=CH_2 Use the chemical formula, (CH_3)_2C_6H_3CH=CH_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 10 H (hydrogen) | 12 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 H (hydrogen) | 12 | 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 H (hydrogen) | 12 | 1.008 | 12 × 1.008 = 12.096 M = 120.110 g/mol + 12.096 g/mol = 132.206 g/mol
Unit conversion
0.13221 kg/mol (kilograms per mole)
Comparisons
≈ ( 0.18 ≈ 1/5 ) × molar mass of fullerene ( ≈ 721 g/mol )
≈ 0.68 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 2.3 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 2.2×10^-22 grams | 2.2×10^-25 kg (kilograms) | 132 u (unified atomic mass units) | 132 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 132