Input interpretation
hydrazine monohydrochloride | molar mass
Result
Find the molar mass, M, for hydrazine monohydrochloride: 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: NH_2NH_2·HCl Use the chemical formula to count the number of atoms, N_i, for each element: | N_i Cl (chlorine) | 1 H (hydrogen) | 5 N (nitrogen) | 2 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) Cl (chlorine) | 1 | 35.45 H (hydrogen) | 5 | 1.008 N (nitrogen) | 2 | 14.007 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) Cl (chlorine) | 1 | 35.45 | 1 × 35.45 = 35.45 H (hydrogen) | 5 | 1.008 | 5 × 1.008 = 5.040 N (nitrogen) | 2 | 14.007 | 2 × 14.007 = 28.014 M = 35.45 g/mol + 5.040 g/mol + 28.014 g/mol = 68.50 g/mol
Unit conversion
0.0685 kg/mol (kilograms per mole)
Comparisons
≈ ( 0.095 ≈ 1/11 ) × molar mass of fullerene ( ≈ 721 g/mol )
≈ 0.35 × molar mass of caffeine ( ≈ 194 g/mol )
≈ 1.2 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
Mass of a molecule m from m = M/N_A: | 1.1×10^-22 grams | 1.1×10^-25 kg (kilograms) | 69 u (unified atomic mass units) | 69 Da (daltons)
Relative molecular mass M_r from M_r = M_u/M: | 69