Input interpretation
![calcium nitrate | molar mass](../image_source/0081d187669f0830b335177fe0f7c412.png)
calcium nitrate | molar mass
Result
![Find the molar mass, M, for calcium 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: Ca(NO_3)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 N (nitrogen) | 2 O (oxygen) | 6 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) Ca (calcium) | 1 | 40.078 N (nitrogen) | 2 | 14.007 O (oxygen) | 6 | 15.999 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) Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 O (oxygen) | 6 | 15.999 | 6 × 15.999 = 95.994 M = 40.078 g/mol + 28.014 g/mol + 95.994 g/mol = 164.086 g/mol](../image_source/73601eca44e6829b4d19cffff030f39c.png)
Find the molar mass, M, for calcium 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: Ca(NO_3)_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Ca (calcium) | 1 N (nitrogen) | 2 O (oxygen) | 6 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) Ca (calcium) | 1 | 40.078 N (nitrogen) | 2 | 14.007 O (oxygen) | 6 | 15.999 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) Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 O (oxygen) | 6 | 15.999 | 6 × 15.999 = 95.994 M = 40.078 g/mol + 28.014 g/mol + 95.994 g/mol = 164.086 g/mol
Unit conversion
![0.16409 kg/mol (kilograms per mole)](../image_source/d714166c1d057c0f895d23df280c313c.png)
0.16409 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.23 ≈ 1/4 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/68b8fbfd138229084a8003c335c0a9ae.png)
≈ ( 0.23 ≈ 1/4 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.84 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/15d794ca567852b81913bf6e7918a3dc.png)
≈ 0.84 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2.8 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/1dadc5f1dc328abdf89d3af510e5c784.png)
≈ 2.8 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2.7×10^-22 grams | 2.7×10^-25 kg (kilograms) | 164 u (unified atomic mass units) | 164 Da (daltons)](../image_source/c8dfc7d8d11b54514270310cc19b2413.png)
Mass of a molecule m from m = M/N_A: | 2.7×10^-22 grams | 2.7×10^-25 kg (kilograms) | 164 u (unified atomic mass units) | 164 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 164](../image_source/e67dc77ac549706e9231a3ed83db96ab.png)
Relative molecular mass M_r from M_r = M_u/M: | 164