Input interpretation
![mercury(I) thiocyanate | molar mass](../image_source/fcb65adc73800187d7dfac4f884c034d.png)
mercury(I) thiocyanate | molar mass
Result
![Find the molar mass, M, for mercury(I) thiocyanate: 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: Hg_2(SCN)_2 Use the chemical formula, Hg_2(SCN)_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 Hg (mercury) | 1 N (nitrogen) | 1 S (sulfur) | 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 Hg (mercury) | 1 | 200.592 N (nitrogen) | 1 | 14.007 S (sulfur) | 1 | 32.06 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 Hg (mercury) | 1 | 200.592 | 1 × 200.592 = 200.592 N (nitrogen) | 1 | 14.007 | 1 × 14.007 = 14.007 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 12.011 g/mol + 200.592 g/mol + 14.007 g/mol + 32.06 g/mol = 258.67 g/mol](../image_source/f6786b4aba420b9a065b3c50e983f48f.png)
Find the molar mass, M, for mercury(I) thiocyanate: 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: Hg_2(SCN)_2 Use the chemical formula, Hg_2(SCN)_2, to count the number of atoms, N_i, for each element: | N_i C (carbon) | 1 Hg (mercury) | 1 N (nitrogen) | 1 S (sulfur) | 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 Hg (mercury) | 1 | 200.592 N (nitrogen) | 1 | 14.007 S (sulfur) | 1 | 32.06 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 Hg (mercury) | 1 | 200.592 | 1 × 200.592 = 200.592 N (nitrogen) | 1 | 14.007 | 1 × 14.007 = 14.007 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 12.011 g/mol + 200.592 g/mol + 14.007 g/mol + 32.06 g/mol = 258.67 g/mol
Unit conversion
![0.25867 kg/mol (kilograms per mole)](../image_source/b709ff8d93dc75c09ca1dc6f11de0724.png)
0.25867 kg/mol (kilograms per mole)
Comparisons
![≈ 0.36 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/e063dc41309bd88efa8223fba2aed05f.png)
≈ 0.36 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/3a1ae66c3582b5ef107e8308dad9b062.png)
≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 4.4 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/1345270ba585fd09f005ea915b7da3ee.png)
≈ 4.4 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 4.3×10^-22 grams | 4.3×10^-25 kg (kilograms) | 259 u (unified atomic mass units) | 259 Da (daltons)](../image_source/51afb2acfb2786b9f63a1489de8b8cff.png)
Mass of a molecule m from m = M/N_A: | 4.3×10^-22 grams | 4.3×10^-25 kg (kilograms) | 259 u (unified atomic mass units) | 259 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 259](../image_source/a36ae281023dac0cc570dc8c98bb08ca.png)
Relative molecular mass M_r from M_r = M_u/M: | 259