Input interpretation
![uranyl nitrate | molar mass](../image_source/864f536c83c5db66630854d397b513c4.png)
uranyl nitrate | molar mass
Result
![Find the molar mass, M, for uranyl nitrate: 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: U_2(NO_3)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i N (nitrogen) | 2 O (oxygen) | 8 U (uranium) | 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) N (nitrogen) | 2 | 14.007 O (oxygen) | 8 | 15.999 U (uranium) | 1 | 238.02891 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 O (oxygen) | 8 | 15.999 | 8 × 15.999 = 127.992 U (uranium) | 1 | 238.02891 | 1 × 238.02891 = 238.02891 M = 28.014 g/mol + 127.992 g/mol + 238.02891 g/mol = 394.035 g/mol](../image_source/3035d68d140597d3b2583ad4a420f0d2.png)
Find the molar mass, M, for uranyl nitrate: 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: U_2(NO_3)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i N (nitrogen) | 2 O (oxygen) | 8 U (uranium) | 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) N (nitrogen) | 2 | 14.007 O (oxygen) | 8 | 15.999 U (uranium) | 1 | 238.02891 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 O (oxygen) | 8 | 15.999 | 8 × 15.999 = 127.992 U (uranium) | 1 | 238.02891 | 1 × 238.02891 = 238.02891 M = 28.014 g/mol + 127.992 g/mol + 238.02891 g/mol = 394.035 g/mol
Unit conversion
![0.39403 kg/mol (kilograms per mole)](../image_source/3ad54fbdb5179a9e8b5981ac9a5887a0.png)
0.39403 kg/mol (kilograms per mole)
Comparisons
![≈ 0.55 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/7377f521a0a315eaf4a995dc42f9e22a.png)
≈ 0.55 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 2 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/a16f8dfb6d430463508eaf79089f156e.png)
≈ 2 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 6.7 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/d58f5c4c6f17780d1fba456a703c70f0.png)
≈ 6.7 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 6.5×10^-22 grams | 6.5×10^-25 kg (kilograms) | 394 u (unified atomic mass units) | 394 Da (daltons)](../image_source/6c2bd6ffa6e16d8281b3cd20d70bcee2.png)
Mass of a molecule m from m = M/N_A: | 6.5×10^-22 grams | 6.5×10^-25 kg (kilograms) | 394 u (unified atomic mass units) | 394 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 394](../image_source/96268fdbd766103194fdaa7e16830cc6.png)
Relative molecular mass M_r from M_r = M_u/M: | 394