Input interpretation
![1, 1-dichloro-1, 2, 2, 2-tetrafluoroethane | molar mass](../image_source/f44775f3aff9547d14ea8ba3c7d9ff81.png)
1, 1-dichloro-1, 2, 2, 2-tetrafluoroethane | molar mass
Result
![Find the molar mass, M, for 1, 1-dichloro-1, 2, 2, 2-tetrafluoroethane: 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_2Cl_2F_4 Use the chemical formula, C_2Cl_2F_4, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 2 Cl (chlorine) | 2 F (fluorine) | 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 Cl (chlorine) | 2 | 35.45 F (fluorine) | 4 | 18.998403163 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 F (fluorine) | 4 | 18.998403163 | 4 × 18.998403163 = 75.993612652 M = 24.022 g/mol + 70.90 g/mol + 75.993612652 g/mol = 170.92 g/mol](../image_source/8d7d552ab7a7d74f52b0878d6086c7f8.png)
Find the molar mass, M, for 1, 1-dichloro-1, 2, 2, 2-tetrafluoroethane: 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_2Cl_2F_4 Use the chemical formula, C_2Cl_2F_4, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 2 Cl (chlorine) | 2 F (fluorine) | 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 Cl (chlorine) | 2 | 35.45 F (fluorine) | 4 | 18.998403163 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 Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 F (fluorine) | 4 | 18.998403163 | 4 × 18.998403163 = 75.993612652 M = 24.022 g/mol + 70.90 g/mol + 75.993612652 g/mol = 170.92 g/mol
Unit conversion
![0.1709 kg/mol (kilograms per mole)](../image_source/fc2ece8a73ed54a8d6e59920e780ff97.png)
0.1709 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.24 ≈ 1/4 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/a7083a8344e5d8309940feb01ec2f876.png)
≈ ( 0.24 ≈ 1/4 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.88 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/9deef129e944d0bb01b86bb05e2120e7.png)
≈ 0.88 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2.9 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/de8e4bf812ac317049a94d2d70979a30.png)
≈ 2.9 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2.8×10^-22 grams | 2.8×10^-25 kg (kilograms) | 171 u (unified atomic mass units) | 171 Da (daltons)](../image_source/d8e99404ed2ca3331d635c81136a829e.png)
Mass of a molecule m from m = M/N_A: | 2.8×10^-22 grams | 2.8×10^-25 kg (kilograms) | 171 u (unified atomic mass units) | 171 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 171](../image_source/7e92623920f887a419a834ff84eef71a.png)
Relative molecular mass M_r from M_r = M_u/M: | 171