Input interpretation
indium(III) perchlorate octahydrate | molar mass
Result
Find the molar mass, M, for indium(III) perchlorate octahydrate: 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: In(ClO_4)_3·8H_2O Use the chemical formula, In(ClO_4)_3·8H_2O, to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 3 H (hydrogen) | 16 In (indium) | 1 O (oxygen) | 20 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) | 3 | 35.45 H (hydrogen) | 16 | 1.008 In (indium) | 1 | 114.818 O (oxygen) | 20 | 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) Cl (chlorine) | 3 | 35.45 | 3 × 35.45 = 106.35 H (hydrogen) | 16 | 1.008 | 16 × 1.008 = 16.128 In (indium) | 1 | 114.818 | 1 × 114.818 = 114.818 O (oxygen) | 20 | 15.999 | 20 × 15.999 = 319.980 M = 106.35 g/mol + 16.128 g/mol + 114.818 g/mol + 319.980 g/mol = 557.28 g/mol
Unit conversion
0.5573 kg/mol (kilograms per mole)
Comparisons
≈ 0.77 × molar mass of fullerene ( ≈ 721 g/mol )
≈ 2.9 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 9.5 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 9.3×10^-22 grams | 9.3×10^-25 kg (kilograms) | 557 u (unified atomic mass units) | 557 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 557