Input interpretation
![bismuth silicate | molar mass](../image_source/9410dcf142c360a97eb82b343ce0ffe3.png)
bismuth silicate | molar mass
Result
![Find the molar mass, M, for bismuth silicate: 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: (Bi_2O_3)_2(SiO_2)_3 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Bi (bismuth) | 1 O (oxygen) | 4 Si (silicon) | 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) Bi (bismuth) | 1 | 208.98040 O (oxygen) | 4 | 15.999 Si (silicon) | 1 | 28.085 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) Bi (bismuth) | 1 | 208.98040 | 1 × 208.98040 = 208.98040 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 Si (silicon) | 1 | 28.085 | 1 × 28.085 = 28.085 M = 208.98040 g/mol + 63.996 g/mol + 28.085 g/mol = 301.061 g/mol](../image_source/bb59530cc3b483386b1d4e0b2cf224ff.png)
Find the molar mass, M, for bismuth silicate: 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: (Bi_2O_3)_2(SiO_2)_3 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Bi (bismuth) | 1 O (oxygen) | 4 Si (silicon) | 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) Bi (bismuth) | 1 | 208.98040 O (oxygen) | 4 | 15.999 Si (silicon) | 1 | 28.085 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) Bi (bismuth) | 1 | 208.98040 | 1 × 208.98040 = 208.98040 O (oxygen) | 4 | 15.999 | 4 × 15.999 = 63.996 Si (silicon) | 1 | 28.085 | 1 × 28.085 = 28.085 M = 208.98040 g/mol + 63.996 g/mol + 28.085 g/mol = 301.061 g/mol
Unit conversion
![0.301061 kg/mol (kilograms per mole)](../image_source/fba97491d2b6597b29efa0a76971eca7.png)
0.301061 kg/mol (kilograms per mole)
Comparisons
![≈ 0.42 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/073fe628924d569aa3342cccc5eaf72b.png)
≈ 0.42 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.6 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/e898d4d402fb4f4a54ca907708b36183.png)
≈ 1.6 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 5.2 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/3153d5996a0a4f16574e793854603f57.png)
≈ 5.2 × 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) | 301 u (unified atomic mass units) | 301 Da (daltons)](../image_source/2e7299f90bb6a45edd554f0eb39c1855.png)
Mass of a molecule m from m = M/N_A: | 5×10^-22 grams | 5×10^-25 kg (kilograms) | 301 u (unified atomic mass units) | 301 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 301](../image_source/720b9437c8ad31a1c2a1c95c4d7cf843.png)
Relative molecular mass M_r from M_r = M_u/M: | 301