Input interpretation
![zinc fluoride | molar mass](../image_source/d2edce5f3c604652f7678b8e734ff0df.png)
zinc fluoride | molar mass
Result
![Find the molar mass, M, for zinc fluoride: 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: ZnF_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 Zn (zinc) | 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) F (fluorine) | 2 | 18.998403163 Zn (zinc) | 1 | 65.38 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) F (fluorine) | 2 | 18.998403163 | 2 × 18.998403163 = 37.996806326 Zn (zinc) | 1 | 65.38 | 1 × 65.38 = 65.38 M = 37.996806326 g/mol + 65.38 g/mol = 103.38 g/mol](../image_source/2050ff180637b948fc30332b63870e52.png)
Find the molar mass, M, for zinc fluoride: 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: ZnF_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 Zn (zinc) | 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) F (fluorine) | 2 | 18.998403163 Zn (zinc) | 1 | 65.38 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) F (fluorine) | 2 | 18.998403163 | 2 × 18.998403163 = 37.996806326 Zn (zinc) | 1 | 65.38 | 1 × 65.38 = 65.38 M = 37.996806326 g/mol + 65.38 g/mol = 103.38 g/mol
Unit conversion
![0.1034 kg/mol (kilograms per mole)](../image_source/e083b91acae20988c824c83b9b471b5d.png)
0.1034 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.14 ≈ 1/7 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/f38db56bd93824846ddcd61eca43e8a0.png)
≈ ( 0.14 ≈ 1/7 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.53 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/da17180abcc8c876d660e9d82100ce2a.png)
≈ 0.53 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.8 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/a420ed017db20d66e01632870fcce546.png)
≈ 1.8 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.7×10^-22 grams | 1.7×10^-25 kg (kilograms) | 103 u (unified atomic mass units) | 103 Da (daltons)](../image_source/08106da2aa74dfe0328ff00cdf4fc74b.png)
Mass of a molecule m from m = M/N_A: | 1.7×10^-22 grams | 1.7×10^-25 kg (kilograms) | 103 u (unified atomic mass units) | 103 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 103](../image_source/ae022e88ac60ff04f1252c87f547d311.png)
Relative molecular mass M_r from M_r = M_u/M: | 103