Input interpretation
![tetrabutylphosphonium chloride | molar mass](../image_source/5d5b7c375d7a39dadfda5212871f3c22.png)
tetrabutylphosphonium chloride | molar mass
Result
![Find the molar mass, M, for tetrabutylphosphonium chloride: 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: (CH_3CH_2CH_2CH_2)_4P(Cl) Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 16 Cl (chlorine) | 1 H (hydrogen) | 36 P (phosphorus) | 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) | 16 | 12.011 Cl (chlorine) | 1 | 35.45 H (hydrogen) | 36 | 1.008 P (phosphorus) | 1 | 30.973761998 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) | 16 | 12.011 | 16 × 12.011 = 192.176 Cl (chlorine) | 1 | 35.45 | 1 × 35.45 = 35.45 H (hydrogen) | 36 | 1.008 | 36 × 1.008 = 36.288 P (phosphorus) | 1 | 30.973761998 | 1 × 30.973761998 = 30.973761998 M = 192.176 g/mol + 35.45 g/mol + 36.288 g/mol + 30.973761998 g/mol = 294.89 g/mol](../image_source/e8814f1a8fed2412dfd14ce92129c47f.png)
Find the molar mass, M, for tetrabutylphosphonium chloride: 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: (CH_3CH_2CH_2CH_2)_4P(Cl) Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 16 Cl (chlorine) | 1 H (hydrogen) | 36 P (phosphorus) | 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) | 16 | 12.011 Cl (chlorine) | 1 | 35.45 H (hydrogen) | 36 | 1.008 P (phosphorus) | 1 | 30.973761998 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) | 16 | 12.011 | 16 × 12.011 = 192.176 Cl (chlorine) | 1 | 35.45 | 1 × 35.45 = 35.45 H (hydrogen) | 36 | 1.008 | 36 × 1.008 = 36.288 P (phosphorus) | 1 | 30.973761998 | 1 × 30.973761998 = 30.973761998 M = 192.176 g/mol + 35.45 g/mol + 36.288 g/mol + 30.973761998 g/mol = 294.89 g/mol
Unit conversion
![0.29489 kg/mol (kilograms per mole)](../image_source/7795fe7f99204356a923f1a3eb37635f.png)
0.29489 kg/mol (kilograms per mole)
Comparisons
![≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/4f24470451ecbff79461213001d7592e.png)
≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/81d690270b7957ae9c83f98024a36849.png)
≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/27db14495159f69c26f01dbe61927f8a.png)
≈ 5 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.9×10^-22 grams | 4.9×10^-25 kg (kilograms) | 295 u (unified atomic mass units) | 295 Da (daltons)](../image_source/6e29602da117d21d0f74bfd75d6381c6.png)
Mass of a molecule m from m = M/N_A: | 4.9×10^-22 grams | 4.9×10^-25 kg (kilograms) | 295 u (unified atomic mass units) | 295 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 295](../image_source/f3a549d3136bb372be57e86efa50e5d4.png)
Relative molecular mass M_r from M_r = M_u/M: | 295