Input interpretation
![antimony pentachloride | molar mass](../image_source/fd40cb718ec5e1f403b861e67151c84f.png)
antimony pentachloride | molar mass
Result
![Find the molar mass, M, for antimony pentachloride: 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: SbCl_5 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 5 Sb (antimony) | 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) | 5 | 35.45 Sb (antimony) | 1 | 121.760 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) | 5 | 35.45 | 5 × 35.45 = 177.25 Sb (antimony) | 1 | 121.760 | 1 × 121.760 = 121.760 M = 177.25 g/mol + 121.760 g/mol = 299.01 g/mol](../image_source/62af6b936ecce8a5011d0df06b457c4a.png)
Find the molar mass, M, for antimony pentachloride: 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: SbCl_5 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 5 Sb (antimony) | 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) | 5 | 35.45 Sb (antimony) | 1 | 121.760 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) | 5 | 35.45 | 5 × 35.45 = 177.25 Sb (antimony) | 1 | 121.760 | 1 × 121.760 = 121.760 M = 177.25 g/mol + 121.760 g/mol = 299.01 g/mol
Unit conversion
![0.299 kg/mol (kilograms per mole)](../image_source/96fdebc151efccd969fe771eed8df9d7.png)
0.299 kg/mol (kilograms per mole)
Comparisons
![≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/071aeb9b00fbea88622ddd1444309e66.png)
≈ 0.41 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/b9763c8427376b4a30a5b520f0fb5cc5.png)
≈ 1.5 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5.1 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/8bd47db98e443dbc8be407504c14e86d.png)
≈ 5.1 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 5×10^-22 grams | 5×10^-25 kg (kilograms) | 299 u (unified atomic mass units) | 299 Da (daltons)](../image_source/8bed38d2cd382d427228ba14d698696a.png)
Mass of a molecule m from m = M/N_A: | 5×10^-22 grams | 5×10^-25 kg (kilograms) | 299 u (unified atomic mass units) | 299 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 299](../image_source/06c6e954097469cb0909819aa979db34.png)
Relative molecular mass M_r from M_r = M_u/M: | 299