Input interpretation
![calcium carbonate | molar mass](../image_source/b1d59284117b2b8842c2abb67a4cb879.png)
calcium carbonate | molar mass
Result
![Find the molar mass, M, for calcium carbonate: 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: CaCO_3 Use the chemical formula to count the number of atoms, N_i, for each element: | number of atoms C (carbon) | 1 Ca (calcium) | 1 O (oxygen) | 3 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | number of atoms | atomic mass/g·mol^(-1) C (carbon) | 1 | 12.011 Ca (calcium) | 1 | 40.078 O (oxygen) | 3 | 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: | | | number of atoms | atomic mass/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 1 | 12.011 | 1 × 12.011 = 12.011 Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 O (oxygen) | 3 | 15.999 | 3 × 15.999 = 47.997 M = 12.011 g/mol + 40.078 g/mol + 47.997 g/mol = 100.086 g/mol](../image_source/b6763d4d41100dc9c71b6e2345f2be80.png)
Find the molar mass, M, for calcium carbonate: 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: CaCO_3 Use the chemical formula to count the number of atoms, N_i, for each element: | number of atoms C (carbon) | 1 Ca (calcium) | 1 O (oxygen) | 3 Look up the atomic mass, m_i, in g·mol^(-1) for each element in the periodic table: | number of atoms | atomic mass/g·mol^(-1) C (carbon) | 1 | 12.011 Ca (calcium) | 1 | 40.078 O (oxygen) | 3 | 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: | | | number of atoms | atomic mass/g·mol^(-1) | mass/g·mol^(-1) C (carbon) | 1 | 12.011 | 1 × 12.011 = 12.011 Ca (calcium) | 1 | 40.078 | 1 × 40.078 = 40.078 O (oxygen) | 3 | 15.999 | 3 × 15.999 = 47.997 M = 12.011 g/mol + 40.078 g/mol + 47.997 g/mol = 100.086 g/mol
Unit conversion
![0.10009 kg/mol (kilograms per mole)](../image_source/d398d93477bc74852c4f1973c0711d75.png)
0.10009 kg/mol (kilograms per mole)
Comparisons
![≈ ( 0.14 ≈ 1/7 ) × molar mass of fullerene (≈ 721 g/mol )](../image_source/be3268a4c5d753a6b478c734d206b9e7.png)
≈ ( 0.14 ≈ 1/7 ) × molar mass of fullerene (≈ 721 g/mol )
![≈ 0.52 × molar mass of caffeine (≈ 194 g/mol )](../image_source/fdc48a7acedcc9b6459eac6450b8c714.png)
≈ 0.52 × molar mass of caffeine (≈ 194 g/mol )
![≈ 1.7 × molar mass of sodium chloride (≈ 58 g/mol )](../image_source/5891bf1f524cfea7f9aa9387aaf87a44.png)
≈ 1.7 × molar mass of sodium chloride (≈ 58 g/mol )
Corresponding quantities
![Mass of a molecule m from m = M/N_A: | 1.7×10^-22 grams | 1.7×10^-25 kg (kilograms) | 100 u (unified atomic mass units) | 100 Da (daltons)](../image_source/618a85765e5863ef751ca6ef18c8a0b4.png)
Mass of a molecule m from m = M/N_A: | 1.7×10^-22 grams | 1.7×10^-25 kg (kilograms) | 100 u (unified atomic mass units) | 100 Da (daltons)
![Relative molecular mass M_r from M_r = M_u/M: | 100](../image_source/57b1d963640738734484fc258d5557e0.png)
Relative molecular mass M_r from M_r = M_u/M: | 100