Input interpretation
ι-carrageenan | molar mass
Result
Find the molar mass, M, for ι-carrageenan: 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_24H_34O_31S_4 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 24 H (hydrogen) | 34 O (oxygen) | 31 S (sulfur) | 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) | 24 | 12.011 H (hydrogen) | 34 | 1.008 O (oxygen) | 31 | 15.999 S (sulfur) | 4 | 32.06 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) | 24 | 12.011 | 24 × 12.011 = 288.264 H (hydrogen) | 34 | 1.008 | 34 × 1.008 = 34.272 O (oxygen) | 31 | 15.999 | 31 × 15.999 = 495.969 S (sulfur) | 4 | 32.06 | 4 × 32.06 = 128.24 M = 288.264 g/mol + 34.272 g/mol + 495.969 g/mol + 128.24 g/mol = 946.75 g/mol
Unit conversion
0.9467 kg/mol (kilograms per mole)
Comparisons
≈ 1.3 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 4.9 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 16 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 1.6×10^-21 grams | 1.6×10^-24 kg (kilograms) | 947 u (unified atomic mass units) | 947 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 947