Input interpretation
![hexamethylmelamine | molecular mass](../image_source/1151ca3659d392ea4a7d5e8a83600314.png)
hexamethylmelamine | molecular mass
Result
![Find the molecular mass, m, for hexamethylmelamine: 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_9H_18N_6 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 9 H (hydrogen) | 18 N (nitrogen) | 6 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u C (carbon) | 9 | 12.011 H (hydrogen) | 18 | 1.008 N (nitrogen) | 6 | 14.007 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u C (carbon) | 9 | 12.011 | 9 × 12.011 = 108.099 H (hydrogen) | 18 | 1.008 | 18 × 1.008 = 18.144 N (nitrogen) | 6 | 14.007 | 6 × 14.007 = 84.042 m = 108.099 u + 18.144 u + 84.042 u = 210.285 u](../image_source/0fe341e4cdf001d57ea137e01162d351.png)
Find the molecular mass, m, for hexamethylmelamine: 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_9H_18N_6 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 9 H (hydrogen) | 18 N (nitrogen) | 6 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u C (carbon) | 9 | 12.011 H (hydrogen) | 18 | 1.008 N (nitrogen) | 6 | 14.007 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u C (carbon) | 9 | 12.011 | 9 × 12.011 = 108.099 H (hydrogen) | 18 | 1.008 | 18 × 1.008 = 18.144 N (nitrogen) | 6 | 14.007 | 6 × 14.007 = 84.042 m = 108.099 u + 18.144 u + 84.042 u = 210.285 u
Unit conversions
![210.29 Da (daltons)](../image_source/025d31498a518f6bce8a5421d3fc3f46.png)
210.29 Da (daltons)
![0.21029 kDa (kilodaltons)](../image_source/99e1e2f0b4b1955b490e3e59f0562854.png)
0.21029 kDa (kilodaltons)
![3.4919×10^-22 grams](../image_source/f8a39a352e7e6e3b89f5b7fd85db4bfd.png)
3.4919×10^-22 grams
![3.4919×10^-25 kg (kilograms)](../image_source/7ae26fd4388e9a91c5c2123b31e7405c.png)
3.4919×10^-25 kg (kilograms)
![210.29 chemical atomic mass units (unit officially deprecated)](../image_source/3a6a313f4320d7a005f8928b38315a0b.png)
210.29 chemical atomic mass units (unit officially deprecated)
![210.35 physical atomic mass units (unit officially deprecated)](../image_source/d524d0ee95e54efd3dd705754c705eff.png)
210.35 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
![≈ 0.29 × molecular mass of fullerene ( ≈ 721 u )](../image_source/33933a98c861672f44ad43a1a5b56237.png)
≈ 0.29 × molecular mass of fullerene ( ≈ 721 u )
![≈ 1.1 × molecular mass of caffeine ( ≈ 194 u )](../image_source/59eb432b727a041770fdec1cd9eb6299.png)
≈ 1.1 × molecular mass of caffeine ( ≈ 194 u )
![≈ 3.6 × molecular mass of sodium chloride ( ≈ 58 u )](../image_source/591aa6a120943e741fe841a826f6a3d1.png)
≈ 3.6 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
![Relative atomic mass A_r from A_r = m_aN_A/M_u: | 210](../image_source/9047b172387adc75d651d570ab3f8fab.png)
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 210
![Molar mass M from M = m_aN_A: | 210 g/mol (grams per mole)](../image_source/196f86a07d702db6129dae78af2f8ce4.png)
Molar mass M from M = m_aN_A: | 210 g/mol (grams per mole)
![Relative molecular mass M_r from M_r = m_mN_A/M_u: | 210](../image_source/fc00d40aabf1fb3852bb6e9c3e767ff6.png)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 210
![Molar mass M from M = m_mN_A: | 210 g/mol (grams per mole)](../image_source/fd8e4cd2d5c47ad530538685ecd03051.png)
Molar mass M from M = m_mN_A: | 210 g/mol (grams per mole)