Input interpretation
cyclopentadienyl cobalt(I) dicarbonyl | molecular mass
Result
Find the molecular mass, m, for cyclopentadienyl cobalt(I) dicarbonyl: 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_5H_5Co(CO)_2 Use the chemical formula, C_5H_5Co(CO)_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 Co (cobalt) | 1 H (hydrogen) | 5 O (oxygen) | 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) | 7 | 12.011 Co (cobalt) | 1 | 58.933194 H (hydrogen) | 5 | 1.008 O (oxygen) | 2 | 15.999 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) | 7 | 12.011 | 7 × 12.011 = 84.077 Co (cobalt) | 1 | 58.933194 | 1 × 58.933194 = 58.933194 H (hydrogen) | 5 | 1.008 | 5 × 1.008 = 5.040 O (oxygen) | 2 | 15.999 | 2 × 15.999 = 31.998 m = 84.077 u + 58.933194 u + 5.040 u + 31.998 u = 180.048 u
Unit conversions
180.05 Da (daltons)
0.18005 kDa (kilodaltons)
2.9898×10^-22 grams
2.9898×10^-25 kg (kilograms)
180.06 chemical atomic mass units (unit officially deprecated)
180.11 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
≈ ( 0.25 ≈ 1/4 ) × molecular mass of fullerene ( ≈ 721 u )
≈ 0.93 × molecular mass of caffeine ( ≈ 194 u )
≈ 3.1 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 180
Molar mass M from M = m_aN_A: | 180 g/mol (grams per mole)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 180
Molar mass M from M = m_mN_A: | 180 g/mol (grams per mole)