Input interpretation
5, 10, 15, 20-tetraphenyl-21H, 23 H-porphine copper(II) | molar mass
Result
Find the molar mass, M, for 5, 10, 15, 20-tetraphenyl-21H, 23 H-porphine copper(II): 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_44H_30CuN_4)^2+ Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cu (copper) | 1 C (carbon) | 44 N (nitrogen) | 4 H (hydrogen) | 30 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) Cu (copper) | 1 | 63.546 C (carbon) | 44 | 12.011 N (nitrogen) | 4 | 14.007 H (hydrogen) | 30 | 1.008 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) Cu (copper) | 1 | 63.546 | 1 × 63.546 = 63.546 C (carbon) | 44 | 12.011 | 44 × 12.011 = 528.484 N (nitrogen) | 4 | 14.007 | 4 × 14.007 = 56.028 H (hydrogen) | 30 | 1.008 | 30 × 1.008 = 30.240 M = 63.546 g/mol + 528.484 g/mol + 56.028 g/mol + 30.240 g/mol = 678.298 g/mol