Input interpretation
![molybdenum carbide | molar mass](../image_source/ed3a5c171d8d3e8052a193db4488da7f.png)
molybdenum carbide | molar mass
Result
![Find the molar mass, M, for molybdenum 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: Mo_2C Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 H (hydrogen) | 4 Mo (molybdenum) | 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 H (hydrogen) | 4 | 1.008 Mo (molybdenum) | 1 | 95.95 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 H (hydrogen) | 4 | 1.008 | 4 × 1.008 = 4.032 Mo (molybdenum) | 1 | 95.95 | 1 × 95.95 = 95.95 M = 12.011 g/mol + 4.032 g/mol + 95.95 g/mol = 111.99 g/mol](../image_source/db4ae80cc4c8bd93fe10f4075cc94769.png)
Find the molar mass, M, for molybdenum 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: Mo_2C Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 H (hydrogen) | 4 Mo (molybdenum) | 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 H (hydrogen) | 4 | 1.008 Mo (molybdenum) | 1 | 95.95 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 H (hydrogen) | 4 | 1.008 | 4 × 1.008 = 4.032 Mo (molybdenum) | 1 | 95.95 | 1 × 95.95 = 95.95 M = 12.011 g/mol + 4.032 g/mol + 95.95 g/mol = 111.99 g/mol
Unit conversion
![0.112 kg/mol (kilograms per mole)](../image_source/694b6f14e31e720c403b5fa2aaab750b.png)
0.112 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/4ffe2c3edeb5e0ee1b00362ad3abc065.png)
≈ ( 0.16 ≈ 1/6 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.58 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/c948f438d1d9236866f90e29f8368fb1.png)
≈ 0.58 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 1.9 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/7f876d514d65ff58c593527880f826fd.png)
≈ 1.9 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.9×10^-22 grams | 1.9×10^-25 kg (kilograms) | 112 u (unified atomic mass units) | 112 Da (daltons)](../image_source/3d5562ad210d1c57a7a435de769af76a.png)
Mass of a molecule m from m = M/N_A: | 1.9×10^-22 grams | 1.9×10^-25 kg (kilograms) | 112 u (unified atomic mass units) | 112 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 112](../image_source/016838e0b22708cbfd0d8ecbd5fe3682.png)
Relative molecular mass M_r from M_r = M_u/M: | 112