Input interpretation
![niobium boride | molecular mass](../image_source/5f0438ad39e6e5878c13fcb774fbf0d7.png)
niobium boride | molecular mass
Result
![Find the molecular mass, m, for niobium boride: 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: NbB Use the chemical formula, NbB, to count the number of atoms, N_i, for each element: | N_i B (boron) | 1 Nb (niobium) | 1 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u B (boron) | 1 | 10.81 Nb (niobium) | 1 | 92.90637 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u B (boron) | 1 | 10.81 | 1 × 10.81 = 10.81 Nb (niobium) | 1 | 92.90637 | 1 × 92.90637 = 92.90637 m = 10.81 u + 92.90637 u = 103.72 u](../image_source/8eb9f9f21a53745fe25f1fe2e8a79b3a.png)
Find the molecular mass, m, for niobium boride: 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: NbB Use the chemical formula, NbB, to count the number of atoms, N_i, for each element: | N_i B (boron) | 1 Nb (niobium) | 1 Look up the atomic mass, m_i, in unified atomic mass units, u, for each element in the periodic table: | N_i | m_i/u B (boron) | 1 | 10.81 Nb (niobium) | 1 | 92.90637 Multiply N_i by m_i to compute the mass for each element. Then sum those values to compute the molecular mass, m: Answer: | | | N_i | m_i/u | mass/u B (boron) | 1 | 10.81 | 1 × 10.81 = 10.81 Nb (niobium) | 1 | 92.90637 | 1 × 92.90637 = 92.90637 m = 10.81 u + 92.90637 u = 103.72 u
Unit conversions
![103.72 Da (daltons)](../image_source/00eb771c6d4e2c07b557c6fb10cf49c6.png)
103.72 Da (daltons)
![0.10372 kDa (kilodaltons)](../image_source/c2f21e7b39596b938139fe197d0435d9.png)
0.10372 kDa (kilodaltons)
![1.7223×10^-22 grams](../image_source/bddd14e92a8e4c23bc42e9f29b158aeb.png)
1.7223×10^-22 grams
![1.7223×10^-25 kg (kilograms)](../image_source/2c769549faff599b35d626c9d7b7d207.png)
1.7223×10^-25 kg (kilograms)
![103.72 chemical atomic mass units (unit officially deprecated)](../image_source/2b8a52b887d64b3d17386809f84684e2.png)
103.72 chemical atomic mass units (unit officially deprecated)
![103.75 physical atomic mass units (unit officially deprecated)](../image_source/7f6ba4282d4c60fdb03f649f0c5d889c.png)
103.75 physical atomic mass units (unit officially deprecated)
Comparisons as mass of molecule
![≈ ( 0.14 ≈ 1/7 ) × molecular mass of fullerene ( ≈ 721 u )](../image_source/240c681e0507206b52067d603c8edb8f.png)
≈ ( 0.14 ≈ 1/7 ) × molecular mass of fullerene ( ≈ 721 u )
![≈ 0.53 × molecular mass of caffeine ( ≈ 194 u )](../image_source/726225a6bea7bda36f8a428414a976b3.png)
≈ 0.53 × molecular mass of caffeine ( ≈ 194 u )
![≈ 1.8 × molecular mass of sodium chloride ( ≈ 58 u )](../image_source/6c7ce01f761ae4ec6dd76e4f44e32b22.png)
≈ 1.8 × molecular mass of sodium chloride ( ≈ 58 u )
Corresponding quantities
![Relative atomic mass A_r from A_r = m_aN_A/M_u: | 104](../image_source/d8bbc99ab7c6d4f997b3a1ee7add839f.png)
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 104
![Molar mass M from M = m_aN_A: | 104 g/mol (grams per mole)](../image_source/243070a57bf1d757dd5a49605a9118a4.png)
Molar mass M from M = m_aN_A: | 104 g/mol (grams per mole)
![Relative molecular mass M_r from M_r = m_mN_A/M_u: | 104](../image_source/3a0dc46ff2c89efc0d88f23e89bd3d8d.png)
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 104
![Molar mass M from M = m_mN_A: | 104 g/mol (grams per mole)](../image_source/4b1485a3b217012a631f7843f7c1239b.png)
Molar mass M from M = m_mN_A: | 104 g/mol (grams per mole)