Input interpretation
![nitrogen | molar mass](../image_source/15ef163f5792fb5ee208e9b99cb9f6b5.png)
nitrogen | molar mass
Result
![Find the molar mass, M, for nitrogen: 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: N_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i N (nitrogen) | 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) N (nitrogen) | 2 | 14.007 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) N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 M = 28.014 g/mol](../image_source/02a545527b3935ee42a4e4aa37834f3b.png)
Find the molar mass, M, for nitrogen: 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: N_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i N (nitrogen) | 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) N (nitrogen) | 2 | 14.007 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) N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 M = 28.014 g/mol
Unit conversion
![0.028014 kg/mol (kilograms per mole)](../image_source/5abfde380875a92a83b4955717777ab3.png)
0.028014 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.14 ≈ 1/7 ) × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/f41bdb83ff65e0f467bcf1c7ac17e368.png)
≈ ( 0.14 ≈ 1/7 ) × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 0.48 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/06d100cb27c51aa095d8d572b6241f64.png)
≈ 0.48 × molar mass of sodium chloride ( ≈ 58 g/mol )
![≈ 1.6 × molar mass of water ( ≈ 18 g/mol )](../image_source/e9dc40692617155135a159eaacece6ec.png)
≈ 1.6 × molar mass of water ( ≈ 18 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.7×10^-23 grams | 4.7×10^-26 kg (kilograms) | 28 u (unified atomic mass units) | 28 Da (daltons)](../image_source/4b3bdb8b07b89ed66c961d0818104721.png)
Mass of a molecule m from m = M/N_A: | 4.7×10^-23 grams | 4.7×10^-26 kg (kilograms) | 28 u (unified atomic mass units) | 28 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 28](../image_source/6ab15229f2262f83922e72e9a6723cdc.png)
Relative molecular mass M_r from M_r = M_u/M: | 28