Input interpretation
2-benzothiazolamine | molar mass
Result
Find the molar mass, M, for 2-benzothiazolamine: 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: C_7H_6N_2S Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 7 H (hydrogen) | 6 N (nitrogen) | 2 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) | 7 | 12.011 H (hydrogen) | 6 | 1.008 N (nitrogen) | 2 | 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) | 7 | 12.011 | 7 × 12.011 = 84.077 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 S (sulfur) | 1 | 32.06 | 1 × 32.06 = 32.06 M = 84.077 g/mol + 6.048 g/mol + 28.014 g/mol + 32.06 g/mol = 150.20 g/mol
Unit conversion
0.1502 kg/mol (kilograms per mole)
Comparisons
≈ ( 0.21 ≈ 1/5 ) × molar mass of fullerene ( ≈ 721 g/mol )
≈ 0.77 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 2.6 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 2.5×10^-22 grams | 2.5×10^-25 kg (kilograms) | 150 u (unified atomic mass units) | 150 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 150