Question

Найти молярную массу CaCl2 ; Na2o ; CuSo4 ; Al2o3 ; K2S​

Answer 1

Ответ:

CaCl2-111

Объяснение:

Na2O-62

CuSO4-160

Al2O3-102

K2S-110

Answer 2

Molar Mass of Compounds

The molar mass of a compound is the mass of one mole of that compound. It is calculated by summing the atomic masses of all the atoms in the compound.

Here are the molar masses of the compounds you provided:

1. CaCl2 (Calcium chloride): - Calcium (Ca) has an atomic mass of 40.08 g/mol. - Chlorine (Cl) has an atomic mass of 35.45 g/mol. - The molar mass of CaCl2 is calculated as follows: - 1 Ca atom: 1 * 40.08 g/mol = 40.08 g/mol - 2 Cl atoms: 2 * 35.45 g/mol = 70.90 g/mol - Total molar mass of CaCl2: 40.08 g/mol + 70.90 g/mol = 110.98 g/mol. 2. Na2O (Sodium oxide): - Sodium (Na) has an atomic mass of 22.99 g/mol. - Oxygen (O) has an atomic mass of 16.00 g/mol. - The molar mass of Na2O is calculated as follows: - 2 Na atoms: 2 * 22.99 g/mol = 45.98 g/mol - 1 O atom: 1 * 16.00 g/mol = 16.00 g/mol - Total molar mass of Na2O: 45.98 g/mol + 16.00 g/mol = 61.98 g/mol. 3. CuSO4 (Copper(II) sulfate): - Copper (Cu) has an atomic mass of 63.55 g/mol. - Sulfur (S) has an atomic mass of 32.07 g/mol. - Oxygen (O) has an atomic mass of 16.00 g/mol. - The molar mass of CuSO4 is calculated as follows: - 1 Cu atom: 1 * 63.55 g/mol = 63.55 g/mol - 1 S atom: 1 * 32.07 g/mol = 32.07 g/mol - 4 O atoms: 4 * 16.00 g/mol = 64.00 g/mol - Total molar mass of CuSO4: 63.55 g/mol + 32.07 g/mol + 64.00 g/mol = 159.62 g/mol. 4. Al2O3 (Aluminum oxide): - Aluminum (Al) has an atomic mass of 26.98 g/mol. - Oxygen (O) has an atomic mass of 16.00 g/mol. - The molar mass of Al2O3 is calculated as follows: - 2 Al atoms: 2 * 26.98 g/mol = 53.96 g/mol - 3 O atoms: 3 * 16.00 g/mol = 48.00 g/mol - Total molar mass of Al2O3: 53.96 g/mol + 48.00 g/mol = 101.96 g/mol. 5. K2S (Potassium sulfide): - Potassium (K) has an atomic mass of 39.10 g/mol. - Sulfur (S) has an atomic mass of 32.07 g/mol. - The molar mass of K2S is calculated as follows: - 2 K atoms: 2 * 39.10 g/mol = 78.20 g/mol - 1 S atom: 1 * 32.07 g/mol = 32.07 g/mol - Total molar mass of K2S: 78.20 g/mol + 32.07 g/mol = 110.27 g/mol. Please note that the molar masses provided are approximate values and may vary slightly depending on the isotopic composition of the elements.

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