Input interpretation
![silicon carbide | molar mass](../image_source/a3388d9d67d6449caeec27355168be53.png)
silicon carbide | molar mass
Result
![Find the molar mass, M, for silicon carbide: 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: SiC Use the chemical formula, SiC, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 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) C (carbon) | 1 | 12.011 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) C (carbon) | 1 | 12.011 | 1 × 12.011 = 12.011 Si (silicon) | 1 | 28.085 | 1 × 28.085 = 28.085 M = 12.011 g/mol + 28.085 g/mol = 40.096 g/mol](../image_source/1d1e9bf0873c5fff528d53b499265f8f.png)
Find the molar mass, M, for silicon carbide: 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: SiC Use the chemical formula, SiC, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 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) C (carbon) | 1 | 12.011 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) C (carbon) | 1 | 12.011 | 1 × 12.011 = 12.011 Si (silicon) | 1 | 28.085 | 1 × 28.085 = 28.085 M = 12.011 g/mol + 28.085 g/mol = 40.096 g/mol
Unit conversion
![0.040096 kg/mol (kilograms per mole)](../image_source/2b60ef7a603a7b7b5f7cf55fcb26fe8f.png)
0.040096 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.056 ≈ 1/18 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/88f321fac79a864e4ee8a6cfe7f62618.png)
≈ ( 0.056 ≈ 1/18 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ ( 0.21 ≈ 1/5 ) × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/c2898d3d3a9a5d3a44540521d86e3705.png)
≈ ( 0.21 ≈ 1/5 ) × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 0.69 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/140d35e057179b35c09adea56d2caa05.png)
≈ 0.69 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 6.7×10^-23 grams | 6.7×10^-26 kg (kilograms) | 40 u (unified atomic mass units) | 40 Da (daltons)](../image_source/4d0c7a7dbce0f644acfbafe72608ab6f.png)
Mass of a molecule m from m = M/N_A: | 6.7×10^-23 grams | 6.7×10^-26 kg (kilograms) | 40 u (unified atomic mass units) | 40 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 40](../image_source/06f9477c55b04eabdfd94496d977ff07.png)
Relative molecular mass M_r from M_r = M_u/M: | 40