Input interpretation
![magnesium bromide ethyl etherate | molar mass](../image_source/f0185ff1bbc4762c38289a21ee4893d0.png)
magnesium bromide ethyl etherate | molar mass
Result
![Find the molar mass, M, for magnesium bromide ethyl etherate: 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: MgBr_2·O(C_2H_5)_2 Use the chemical formula, MgBr_2·O(C_2H_5)_2, to count the number of atoms, N_i, for each element: | N_i Br (bromine) | 2 C (carbon) | 4 H (hydrogen) | 10 Mg (magnesium) | 1 O (oxygen) | 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) Br (bromine) | 2 | 79.904 C (carbon) | 4 | 12.011 H (hydrogen) | 10 | 1.008 Mg (magnesium) | 1 | 24.305 O (oxygen) | 1 | 15.999 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) Br (bromine) | 2 | 79.904 | 2 × 79.904 = 159.808 C (carbon) | 4 | 12.011 | 4 × 12.011 = 48.044 H (hydrogen) | 10 | 1.008 | 10 × 1.008 = 10.080 Mg (magnesium) | 1 | 24.305 | 1 × 24.305 = 24.305 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 159.808 g/mol + 48.044 g/mol + 10.080 g/mol + 24.305 g/mol + 15.999 g/mol = 258.236 g/mol](../image_source/e2b2743a9ac15ce040ed975720746ddd.png)
Find the molar mass, M, for magnesium bromide ethyl etherate: 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: MgBr_2·O(C_2H_5)_2 Use the chemical formula, MgBr_2·O(C_2H_5)_2, to count the number of atoms, N_i, for each element: | N_i Br (bromine) | 2 C (carbon) | 4 H (hydrogen) | 10 Mg (magnesium) | 1 O (oxygen) | 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) Br (bromine) | 2 | 79.904 C (carbon) | 4 | 12.011 H (hydrogen) | 10 | 1.008 Mg (magnesium) | 1 | 24.305 O (oxygen) | 1 | 15.999 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) Br (bromine) | 2 | 79.904 | 2 × 79.904 = 159.808 C (carbon) | 4 | 12.011 | 4 × 12.011 = 48.044 H (hydrogen) | 10 | 1.008 | 10 × 1.008 = 10.080 Mg (magnesium) | 1 | 24.305 | 1 × 24.305 = 24.305 O (oxygen) | 1 | 15.999 | 1 × 15.999 = 15.999 M = 159.808 g/mol + 48.044 g/mol + 10.080 g/mol + 24.305 g/mol + 15.999 g/mol = 258.236 g/mol
Unit conversion
![0.25824 kg/mol (kilograms per mole)](../image_source/6747b78cfea908a972514a16e0b843e4.png)
0.25824 kg/mol (kilograms per mole)
Comparisons
![≈ 0.36 × molar mass of fullerene ( ≈ 721 g/mol )](../image_source/5da2f73c6ec54a8cea9cf5278a3ccbe8.png)
≈ 0.36 × molar mass of fullerene ( ≈ 721 g/mol )
![≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )](../image_source/9d731f7bf07b227d31705da4ca56a819.png)
≈ 1.3 × molar mass of caffeine ( ≈ 194 g/mol )
![≈ 4.4 × molar mass of sodium chloride ( ≈ 58 g/mol )](../image_source/3b304b922226f1bff1dcacec3499f6ad.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) | 258 u (unified atomic mass units) | 258 Da (daltons)](../image_source/0899ed202141e5e1b48b6cd3bfda9403.png)
Mass of a molecule m from m = M/N_A: | 4.3×10^-22 grams | 4.3×10^-25 kg (kilograms) | 258 u (unified atomic mass units) | 258 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 258](../image_source/b5c1e0ecd267c81f2b0b88d21cb25978.png)
Relative molecular mass M_r from M_r = M_u/M: | 258