Input interpretation
vanadyl phthalocyanine | molecular mass
Result
Find the molecular mass, m, for vanadyl phthalocyanine: 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_32H_16N_8OV Use the chemical formula, C_32H_16N_8OV, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 32 H (hydrogen) | 16 N (nitrogen) | 8 O (oxygen) | 1 V (vanadium) | 1 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) | 32 | 12.011 H (hydrogen) | 16 | 1.008 N (nitrogen) | 8 | 14.007 O (oxygen) | 1 | 15.999 V (vanadium) | 1 | 50.9415 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) | 32 | 12.011 | 32 × 12.011 = 384.352 H (hydrogen) | 16 | 1.008 | 16 × 1.008 = 16.128 N (nitrogen) | 8 | 14.007 | 8 × 14.007 = 112.056 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 V (vanadium) | 1 | 50.9415 | 1 × 50.9415 = 50.9415 m = 384.352 u + 16.128 u + 112.056 u + 15.999 u + 50.9415 u = 579.477 u
Unit conversions
579.48 Da (daltons)
0.57948 kDa (kilodaltons)
9.622×10^-22 grams
9.622×10^-25 kg (kilograms)
579.5 chemical atomic mass units (unit officially deprecated)
579.66 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
≈ 0.8 × molecular mass of fullerene ( ≈ 721 u )
≈ 3 × molecular mass of caffeine ( ≈ 194 u )
≈ 9.9 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 579
Molar mass M from M = m_aN_A: | 579 g/mol (grams per mole)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 579
Molar mass M from M = m_mN_A: | 579 g/mol (grams per mole)