Input interpretation
![lead(II) chlorite | molar mass](../image_source/c9d49708a206098f8b886b488cb89d23.png)
lead(II) chlorite | molar mass
Result
![Find the molar mass, M, for lead(II) chlorite: 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: Pb(ClO_2)_2 Use the chemical formula, Pb(ClO_2)_2, to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 O (oxygen) | 4 Pb (lead) | 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) Cl (chlorine) | 2 | 35.45 O (oxygen) | 4 | 15.999 Pb (lead) | 1 | 207.2 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) Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 Pb (lead) | 1 | 207.2 | 1 × 207.2 = 207.2 M = 70.90 g/mol + 63.996 g/mol + 207.2 g/mol = 342.1 g/mol](../image_source/f68a047006233ad006ca41aaf22e40a6.png)
Find the molar mass, M, for lead(II) chlorite: 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: Pb(ClO_2)_2 Use the chemical formula, Pb(ClO_2)_2, to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 O (oxygen) | 4 Pb (lead) | 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) Cl (chlorine) | 2 | 35.45 O (oxygen) | 4 | 15.999 Pb (lead) | 1 | 207.2 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) Cl (chlorine) | 2 | 35.45 | 2 × 35.45 = 70.90 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 Pb (lead) | 1 | 207.2 | 1 × 207.2 = 207.2 M = 70.90 g/mol + 63.996 g/mol + 207.2 g/mol = 342.1 g/mol
Unit conversion
![0.3421 kg/mol (kilograms per mole)](../image_source/8e1c5877ed0dec2f49b141c1dcd5e6e0.png)
0.3421 kg/mol (kilograms per mole)
Comparisons
![≈ 0.47 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/e0c2ba7965f19f2522dda882112e5f10.png)
≈ 0.47 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.8 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/2d2f49d3e6ee4aae4fd84534e6b508c1.png)
≈ 1.8 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5.9 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/0db014cdd3a9a97eeb61022eb6cca26f.png)
≈ 5.9 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 5.7×10^-22 grams | 5.7×10^-25 kg (kilograms) | 342 u (unified atomic mass units) | 342 Da (daltons)](../image_source/13ceab9dc5d096d73436676080c46986.png)
Mass of a molecule m from m = M/N_A: | 5.7×10^-22 grams | 5.7×10^-25 kg (kilograms) | 342 u (unified atomic mass units) | 342 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 342](../image_source/ba3fe3a60e1f1c575a3445b2af9393f7.png)
Relative molecular mass M_r from M_r = M_u/M: | 342