Input interpretation
![tropolone | molar mass](../image_source/3c030053750601972c264ad27810d943.png)
tropolone | molar mass
Result
![Find the molar mass, M, for tropolone: 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_7H_6O_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 H (hydrogen) | 6 O (oxygen) | 2 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) C (carbon) | 7 | 12.011 H (hydrogen) | 6 | 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 molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 7 | 12.011 | 7 × 12.011 = 84.077 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 O (oxygen) | 2 | 15.999 | 2 × 15.999 = 31.998 M = 84.077 g/mol + 6.048 g/mol + 31.998 g/mol = 122.123 g/mol](../image_source/fb763339934a667d45f3d295d93310f3.png)
Find the molar mass, M, for tropolone: 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_7H_6O_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 H (hydrogen) | 6 O (oxygen) | 2 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) C (carbon) | 7 | 12.011 H (hydrogen) | 6 | 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 molar mass, M: Answer: | | | N_i | m_i/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 7 | 12.011 | 7 × 12.011 = 84.077 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 O (oxygen) | 2 | 15.999 | 2 × 15.999 = 31.998 M = 84.077 g/mol + 6.048 g/mol + 31.998 g/mol = 122.123 g/mol
Unit conversion
![0.12212 kg/mol (kilograms per mole)](../image_source/92497d77a6660eb3aaa406b1f7415218.png)
0.12212 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.17 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/14d2838eab8020d32998584d0f859034.png)
≈ ( 0.17 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.63 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/cc6b62fccd6d70c0480a70cfca966cf6.png)
≈ 0.63 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2.1 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/d0f13c544a34cbc599077b5ce7f8562b.png)
≈ 2.1 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2×10^-22 grams | 2×10^-25 kg (kilograms) | 122 u (unified atomic mass units) | 122 Da (daltons)](../image_source/5cc006114a8ee7f21791fc061446dc27.png)
Mass of a molecule m from m = M/N_A: | 2×10^-22 grams | 2×10^-25 kg (kilograms) | 122 u (unified atomic mass units) | 122 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 122](../image_source/2fb6f7c26c6080c616df8a8d6e160c93.png)
Relative molecular mass M_r from M_r = M_u/M: | 122