molecular mass of teriparatide

teriparatide | molecular mass

Find the molecular mass, m, for teriparatide: 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_181H_291N_55O_51S_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 181 H (hydrogen) | 291 N (nitrogen) | 55 O (oxygen) | 51 S (sulfur) | 2 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u C (carbon) | 181 | 12.011 H (hydrogen) | 291 | 1.008 N (nitrogen) | 55 | 14.007 O (oxygen) | 51 | 15.999 S (sulfur) | 2 | 32.06 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u C (carbon) | 181 | 12.011 | 181 × 12.011 = 2173.991 H (hydrogen) | 291 | 1.008 | 291 × 1.008 = 293.328 N (nitrogen) | 55 | 14.007 | 55 × 14.007 = 770.385 O (oxygen) | 51 | 15.999 | 51 × 15.999 = 815.949 S (sulfur) | 2 | 32.06 | 2 × 32.06 = 64.12 m = 2173.991 u + 293.328 u + 770.385 u + 815.949 u + 64.12 u = 4117.77 u

4.1178 kDa (kilodaltons)

4117.8 Da (daltons)

6.838×10^-21 grams

6.838×10^-24 kg (kilograms)

4118 chemical atomic mass units (unit officially deprecated)

4119.1 physical atomic mass units (unit officially deprecated)

≈ 5.7 × molecular mass of fullerene ( ≈ 721 u )

≈ 21 × molecular mass of caffeine ( ≈ 194 u )

≈ 70 × molecular mass of sodium chloride ( ≈ 58 u )

Relative atomic mass A_r from A_r = m_aN_A/M_u: | 4118

Relative molecular mass M_r from M_r = m_mN_A/M_u: | 4118