molecular mass of lucifer yellow cH

lucifer yellow cH | molecular mass

Find the molecular mass, m, for lucifer yellow cH: 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_13H_9Li_2N_5O_9S_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 13 H (hydrogen) | 9 Li (lithium) | 2 N (nitrogen) | 5 O (oxygen) | 9 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) | 13 | 12.011 H (hydrogen) | 9 | 1.008 Li (lithium) | 2 | 6.94 N (nitrogen) | 5 | 14.007 O (oxygen) | 9 | 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) | 13 | 12.011 | 13 × 12.011 = 156.143 H (hydrogen) | 9 | 1.008 | 9 × 1.008 = 9.072 Li (lithium) | 2 | 6.94 | 2 × 6.94 = 13.88 N (nitrogen) | 5 | 14.007 | 5 × 14.007 = 70.035 O (oxygen) | 9 | 15.999 | 9 × 15.999 = 143.991 S (sulfur) | 2 | 32.06 | 2 × 32.06 = 64.12 m = 156.143 u + 9.072 u + 13.88 u + 70.035 u + 143.991 u + 64.12 u = 457.24 u

457.2 Da (daltons)

0.4572 kDa (kilodaltons)

7.593×10^-22 grams

7.593×10^-25 kg (kilograms)

457.3 chemical atomic mass units (unit officially deprecated)

457.4 physical atomic mass units (unit officially deprecated)

≈ 0.63 × molecular mass of fullerene ( ≈ 721 u )

≈ 2.4 × molecular mass of caffeine ( ≈ 194 u )

≈ 7.8 × molecular mass of sodium chloride ( ≈ 58 u )

Relative atomic mass A_r from A_r = m_aN_A/M_u: | 457

Molar mass M from M = m_aN_A: | 457 g/mol (grams per mole)

Relative molecular mass M_r from M_r = m_mN_A/M_u: | 457

Molar mass M from M = m_mN_A: | 457 g/mol (grams per mole)