Input interpretation
![neodymium(II) chloride | molar mass](../image_source/9069d8165d62cea9cd2ec81e47b4bfe4.png)
neodymium(II) chloride | molar mass
Result
![Find the molar mass, M, for neodymium(II) chloride: 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: NdCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Nd (neodymium) | 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 Nd (neodymium) | 1 | 144.242 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 Nd (neodymium) | 1 | 144.242 | 1 × 144.242 = 144.242 M = 70.90 g/mol + 144.242 g/mol = 215.14 g/mol](../image_source/0f2b2b0e4b5bc192a57b9e6f7e471e71.png)
Find the molar mass, M, for neodymium(II) chloride: 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: NdCl_2 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 2 Nd (neodymium) | 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 Nd (neodymium) | 1 | 144.242 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 Nd (neodymium) | 1 | 144.242 | 1 × 144.242 = 144.242 M = 70.90 g/mol + 144.242 g/mol = 215.14 g/mol
Unit conversion
![0.2151 kg/mol (kilograms per mole)](../image_source/c779ff02e97ec60bf7b1163fc234cabb.png)
0.2151 kg/mol (kilograms per mole)
Comparisons
![≈ 0.3 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/57d8570d354bebaf536e64bc1406f505.png)
≈ 0.3 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.1 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/720f0270aca92dc369210dd5b8637777.png)
≈ 1.1 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 3.7 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/bebc965d7bf0e4d08f980eacf33b3969.png)
≈ 3.7 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 3.6×10^-22 grams | 3.6×10^-25 kg (kilograms) | 215 u (unified atomic mass units) | 215 Da (daltons)](../image_source/4c797256b70511b073bfd2854ccc44d1.png)
Mass of a molecule m from m = M/N_A: | 3.6×10^-22 grams | 3.6×10^-25 kg (kilograms) | 215 u (unified atomic mass units) | 215 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 215](../image_source/2fe69453a5e7408051caa15e7b795663.png)
Relative molecular mass M_r from M_r = M_u/M: | 215