Input interpretation
![fluorine | molar mass](../image_source/aed4c7838bb9bd6485dc3bc19dcae960.png)
fluorine | molar mass
Result
![Find the molar mass, M, for fluorine: 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: F_2 Use the chemical formula, F_2, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 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 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 M = 37.996806326 g/mol](../image_source/752d646d019e01daf7437fae4b46daed.png)
Find the molar mass, M, for fluorine: 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: F_2 Use the chemical formula, F_2, to count the number of atoms, N_i, for each element: | N_i F (fluorine) | 2 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 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 M = 37.996806326 g/mol
Unit conversion
![0.037996806326 kg/mol (kilograms per mole)](../image_source/22088ae3b490cbc396980aff1003a36e.png)
0.037996806326 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.053 ≈ 1/19 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/689d6eb4e1876d7a1fdf176e1266febb.png)
≈ ( 0.053 ≈ 1/19 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ ( 0.2 ≈ 1/5 ) × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/f44d1ba3bd346ad78567431f838f9baa.png)
≈ ( 0.2 ≈ 1/5 ) × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 0.65 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/49ed9810b3003b3ba1937802df7862d7.png)
≈ 0.65 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 6.3×10^-23 grams | 6.3×10^-26 kg (kilograms) | 38 u (unified atomic mass units) | 38 Da (daltons)](../image_source/4f542c1a785742ffda296cbbbf9900e0.png)
Mass of a molecule m from m = M/N_A: | 6.3×10^-23 grams | 6.3×10^-26 kg (kilograms) | 38 u (unified atomic mass units) | 38 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 38](../image_source/c68849a6c8c7a189452a742953f47017.png)
Relative molecular mass M_r from M_r = M_u/M: | 38