Input interpretation
![2-thienyllithium | molar mass](../image_source/95c17c2602453fa406d088e49ff5c017.png)
2-thienyllithium | molar mass
Result
![Find the molar mass, M, for 2-thienyllithium: 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_4H_3LiS Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 4 H (hydrogen) | 3 Li (lithium) | 1 S (sulfur) | 1 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) | 4 | 12.011 H (hydrogen) | 3 | 1.008 Li (lithium) | 1 | 6.94 S (sulfur) | 1 | 32.06 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) | 4 | 12.011 | 4 × 12.011 = 48.044 H (hydrogen) | 3 | 1.008 | 3 × 1.008 = 3.024 Li (lithium) | 1 | 6.94 | 1 × 6.94 = 6.94 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 48.044 g/mol + 3.024 g/mol + 6.94 g/mol + 32.06 g/mol = 90.07 g/mol](../image_source/853d39a385bfeace626fbf2bf87678d7.png)
Find the molar mass, M, for 2-thienyllithium: 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_4H_3LiS Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 4 H (hydrogen) | 3 Li (lithium) | 1 S (sulfur) | 1 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) | 4 | 12.011 H (hydrogen) | 3 | 1.008 Li (lithium) | 1 | 6.94 S (sulfur) | 1 | 32.06 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) | 4 | 12.011 | 4 × 12.011 = 48.044 H (hydrogen) | 3 | 1.008 | 3 × 1.008 = 3.024 Li (lithium) | 1 | 6.94 | 1 × 6.94 = 6.94 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 48.044 g/mol + 3.024 g/mol + 6.94 g/mol + 32.06 g/mol = 90.07 g/mol
Unit conversion
![0.0901 kg/mol (kilograms per mole)](../image_source/590118122b96eef8bf31775fff63891a.png)
0.0901 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/84d75ee4957be80df0dcf24f65adccd4.png)
≈ ( 0.12 ≈ 1/8 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/4bf8c3a1fe99c3f4874fc9ec2f718462.png)
≈ 0.46 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.5 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/759b393542f809e8ccda44dc1866cf90.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/8085ca8ba82af0b09561614e640ed0d2.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/4197ae2bcb0e8bf825c994ec70e87c54.png)
Relative molecular mass M_r from M_r = M_u/M: | 90