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molecular mass of ethane

Input interpretation

ethane | molecular mass
ethane | molecular mass

Result

Find the molecular mass, m, for ethane: 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: CH_3CH_3 Use the chemical formula to count the number of atoms, N_i, for each element:  | N_i  C (carbon) | 2  H (hydrogen) | 6 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  C (carbon) | 2 | 12.011  H (hydrogen) | 6 | 1.008 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  C (carbon) | 2 | 12.011 | 2 × 12.011 = 24.022  H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048  m = 24.022 u + 6.048 u = 30.070 u
Find the molecular mass, m, for ethane: 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: CH_3CH_3 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 2 H (hydrogen) | 6 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 C (carbon) | 2 | 12.011 H (hydrogen) | 6 | 1.008 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 C (carbon) | 2 | 12.011 | 2 × 12.011 = 24.022 H (hydrogen) | 6 | 1.008 | 6 × 1.008 = 6.048 m = 24.022 u + 6.048 u = 30.070 u

Unit conversions

30.07 Da (daltons)
30.07 Da (daltons)
0.03007 kDa (kilodaltons)
0.03007 kDa (kilodaltons)
4.993×10^-23 grams
4.993×10^-23 grams
4.993×10^-26 kg (kilograms)
4.993×10^-26 kg (kilograms)
30.071 chemical atomic mass units  (unit officially deprecated)
30.071 chemical atomic mass units (unit officially deprecated)
30.08 physical atomic mass units  (unit officially deprecated)
30.08 physical atomic mass units (unit officially deprecated)

Comparisons as mass of molecule

 ≈ ( 0.15 ≈ 1/6 ) × molecular mass of caffeine ( ≈ 194 u )
≈ ( 0.15 ≈ 1/6 ) × molecular mass of caffeine ( ≈ 194 u )
 ≈ 0.51 × molecular mass of sodium chloride ( ≈ 58 u )
≈ 0.51 × molecular mass of sodium chloride ( ≈ 58 u )
 ≈ 1.7 × molecular mass of water ( ≈ 18 u )
≈ 1.7 × molecular mass of water ( ≈ 18 u )

Corresponding quantities

Relative atomic mass A_r from A_r = m_aN_A/M_u:  | 30
Relative atomic mass A_r from A_r = m_aN_A/M_u: | 30
Molar mass M from M = m_aN_A:  | 30 g/mol (grams per mole)
Molar mass M from M = m_aN_A: | 30 g/mol (grams per mole)
Relative molecular mass M_r from M_r = m_mN_A/M_u:  | 30
Relative molecular mass M_r from M_r = m_mN_A/M_u: | 30
Molar mass M from M = m_mN_A:  | 30 g/mol (grams per mole)
Molar mass M from M = m_mN_A: | 30 g/mol (grams per mole)