Input interpretation
![oxalic acid | molar mass](../image_source/b84fff70643328adc0c63a84cc54cd5a.png)
oxalic acid | molar mass
Result
![Find the molar mass, M, for oxalic acid: 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: HO_2CCO_2H Use the chemical formula, HO_2CCO_2H, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 2 H (hydrogen) | 2 O (oxygen) | 4 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) | 2 | 12.011 H (hydrogen) | 2 | 1.008 O (oxygen) | 4 | 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) | 2 | 12.011 | 2 × 12.011 = 24.022 H (hydrogen) | 2 | 1.008 | 2 × 1.008 = 2.016 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 M = 24.022 g/mol + 2.016 g/mol + 63.996 g/mol = 90.034 g/mol](../image_source/4f2efd693d0939a8daaa67b5053f0a83.png)
Find the molar mass, M, for oxalic acid: 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: HO_2CCO_2H Use the chemical formula, HO_2CCO_2H, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 2 H (hydrogen) | 2 O (oxygen) | 4 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) | 2 | 12.011 H (hydrogen) | 2 | 1.008 O (oxygen) | 4 | 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) | 2 | 12.011 | 2 × 12.011 = 24.022 H (hydrogen) | 2 | 1.008 | 2 × 1.008 = 2.016 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 M = 24.022 g/mol + 2.016 g/mol + 63.996 g/mol = 90.034 g/mol
Unit conversion
![0.09003 kg/mol (kilograms per mole)](../image_source/c97c17a938d990a7f966ca437ef0697b.png)
0.09003 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/1497f4bd997382ba40f0c0c76c53d502.png)
≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/304a0e585d9bab796f84c313ae3c4ab7.png)
≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.5 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/777313e62708ceb28881e0d885ada233.png)
≈ 1.5 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.5×10^-22 grams | 1.5×10^-25 kg (kilograms) | 90 u (unified atomic mass units) | 90 Da (daltons)](../image_source/6b101a1083d7227633bbca0bad847788.png)
Mass of a molecule m from m = M/N_A: | 1.5×10^-22 grams | 1.5×10^-25 kg (kilograms) | 90 u (unified atomic mass units) | 90 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 90](../image_source/0cd900a55bee85a2d145cd2c284d4c1d.png)
Relative molecular mass M_r from M_r = M_u/M: | 90