Input interpretation
![4, 4-dimethyl octane | molar mass](../image_source/d31b9e894f4e78241052691a715524eb.png)
4, 4-dimethyl octane | molar mass
Result
![Find the molar mass, M, for 4, 4-dimethyl octane: 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_10H_22 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 10 H (hydrogen) | 22 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) | 10 | 12.011 H (hydrogen) | 22 | 1.008 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) | 10 | 12.011 | 10 × 12.011 = 120.110 H (hydrogen) | 22 | 1.008 | 22 × 1.008 = 22.176 M = 120.110 g/mol + 22.176 g/mol = 142.286 g/mol](../image_source/5fccc9e0b524927a08ffb78add7ae7bb.png)
Find the molar mass, M, for 4, 4-dimethyl octane: 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_10H_22 Use the chemical formula to count the number of atoms, N_i, for each element: | N_i C (carbon) | 10 H (hydrogen) | 22 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) | 10 | 12.011 H (hydrogen) | 22 | 1.008 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) | 10 | 12.011 | 10 × 12.011 = 120.110 H (hydrogen) | 22 | 1.008 | 22 × 1.008 = 22.176 M = 120.110 g/mol + 22.176 g/mol = 142.286 g/mol
Unit conversion
![0.14229 kg/mol (kilograms per mole)](../image_source/745fc42bdbf89fd611f8dc0d5b674fef.png)
0.14229 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.2 ≈ 1/5 ) × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/750a6de64de287512ff385d3242ec600.png)
≈ ( 0.2 ≈ 1/5 ) × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 0.73 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/8762c91355d69369cc2b5a3cf85fd7fe.png)
≈ 0.73 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 2.4 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/c36e279842d252b5d97b1bc185865b7b.png)
≈ 2.4 × molar mass of sodium chloride ( ≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 2.4×10^-22 grams | 2.4×10^-25 kg (kilograms) | 142 u (unified atomic mass units) | 142 Da (daltons)](../image_source/f91339facaa3e25fa8d6daac25267d52.png)
Mass of a molecule m from m = M/N_A: | 2.4×10^-22 grams | 2.4×10^-25 kg (kilograms) | 142 u (unified atomic mass units) | 142 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 142](../image_source/38b2cbfe651b9c85eeacd0f73cd39257.png)
Relative molecular mass M_r from M_r = M_u/M: | 142