Input interpretation
![tetraphenylethylene | molar mass](../image_source/c4c2ecd5e327d5d712d7baf3f394b315.png)
tetraphenylethylene | molar mass
Result
![Find the molar mass, M, for tetraphenylethylene: 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_6H_5)_2C=C(C_6H_5)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 26 H (hydrogen) | 20 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) | 26 | 12.011 H (hydrogen) | 20 | 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) C (carbon) | 26 | 12.011 | 26 × 12.011 = 312.286 H (hydrogen) | 20 | 1.008 | 20 × 1.008 = 20.160 M = 312.286 g/mol + 20.160 g/mol = 332.446 g/mol](../image_source/d95658dfd832ea05a88cf9b2b3a97536.png)
Find the molar mass, M, for tetraphenylethylene: 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_6H_5)_2C=C(C_6H_5)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 26 H (hydrogen) | 20 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) | 26 | 12.011 H (hydrogen) | 20 | 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) C (carbon) | 26 | 12.011 | 26 × 12.011 = 312.286 H (hydrogen) | 20 | 1.008 | 20 × 1.008 = 20.160 M = 312.286 g/mol + 20.160 g/mol = 332.446 g/mol
Unit conversion
![0.33245 kg/mol (kilograms per mole)](../image_source/695ccb3aff544d73f9ff7bca95033944.png)
0.33245 kg/mol (kilograms per mole)
Comparisons
![≈ 0.46 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/f1bc60e3c7b85b33cebd20be6ff8fde6.png)
≈ 0.46 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.7 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/e840dfe5f8b51778f6023c142cd0811e.png)
≈ 1.7 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5.7 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/85ba5ecfceb948569eeaf4b9a3c8438d.png)
≈ 5.7 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 5.5×10^-22 grams | 5.5×10^-25 kg (kilograms) | 332 u (unified atomic mass units) | 332 Da (daltons)](../image_source/b9cb81db35b9b5917ec16bcd0a1612aa.png)
Mass of a molecule m from m = M/N_A: | 5.5×10^-22 grams | 5.5×10^-25 kg (kilograms) | 332 u (unified atomic mass units) | 332 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 332](../image_source/45ab41fec8e2fbecb17c3d2920fd3555.png)
Relative molecular mass M_r from M_r = M_u/M: | 332