Question

Найти молярную массу гидрида кальция, оксида фосфора (V), хлорида алюминия, карбида железа (III)

Answer 1

М(CaH₂) = 40 + 1·2 = 42 г\моль
M(P₂O₅) = 31 · 2 + 16· 5 = 142 г\моль
M(AlCl₃) = 27 + 35,5 ·3 = 133,5 г\моль
M(Fe₄C₃) =56· 4 + 12 · 3 = 260 г\моль

Answer 2

Molar Mass of Calcium Hydride (CaH2)

The molar mass of calcium hydride (CaH2) can be calculated by adding the atomic masses of calcium (Ca) and hydrogen (H).

The atomic mass of calcium (Ca) is approximately 40.08 g/mol The atomic mass of hydrogen (H) is approximately 1.01 g/mol.

To calculate the molar mass of calcium hydride (CaH2), we add the atomic masses of calcium and hydrogen: Molar mass of CaH2 = (1 * atomic mass of Ca) + (2 * atomic mass of H) Molar mass of CaH2 = (1 * 40.08 g/mol) +#### Molar Mass Calculation for Calcium Hydride, Phosphorus (V) Oxide, Aluminum Chloride, and Iron (III) Carbide

To calculate the molar mass of each compound, we need to consider the atomic masses of the elements present in each compound and then sum them up according to their respective stoichiometric coefficients.

1. Calcium Hydride (CaH2) - Calcium (Ca) has an atomic mass of approximately 40.08 g/mol. - Hydrogen (H) has an atomic mass of approximately 1.01 g/mol. - The molar mass of calcium hydride (CaH2) can be calculated as: ``` Molar mass = (1 * atomic mass of Ca) + (2 * atomic mass of H) = (1 * 40.08 g/mol) + (2 * 1.01 g/mol) = 40.08 g/mol + 2.02 g/mol = 42.10 g/mol ```

2. Phosphorus (V) Oxide (P2O5) - Phosphorus (P) has an atomic mass of approximately 30.97 g/mol. - Oxygen (O) has an atomic mass of approximately 16.00 g/mol. - The molar mass of phosphorus (V) oxide (P2O5) can be calculated as: ``` Molar mass = (2 * atomic mass of P) + (5 * atomic mass of O) = (2 * 30.97 g/mol) + (5 * 16.00 g/mol) = 61.94 g/mol + 80.00 g/mol = 141.94 g/mol ```

3. Aluminum Chloride (AlCl3) - Aluminum (Al) has an atomic mass of approximately 26.98 g/mol. - Chlorine (Cl) has an atomic mass of approximately 35.45 g/mol. - The molar mass of aluminum chloride (AlCl3) can be calculated as: ``` Molar mass = (1 * atomic mass of Al) + (3 * atomic mass of Cl) = (1 * 26.98 g/mol) + (3 * 35.45 g/mol) = 26.98 g/mol + 106.35 g/mol = 133.33 g/mol ```

4. Iron (III) Carbide (Fe2C3) - Iron (Fe) has an atomic mass of approximately 55.85 g/mol. - Carbon (C) has an atomic mass of approximately 12.01 g/mol. - The molar mass of iron (III) carbide (Fe2C3) can be calculated as: ``` Molar mass = (2 * atomic mass of Fe) + (3 * atomic mass of C) = (2 * 55.85 g/mol) + (3 * 12.01 g/mol) = 111.70 g/mol + 36.03 g/mol = 147.73 g/mol ```

So, the molar masses of the compounds are as follows: - Calcium Hydride (CaH2): 42.10 g/mol - Phosphorus (V) Oxide (P2O5): 141.94 g/mol - Aluminum Chloride (AlCl3): 133.33 g/mol - Iron (III) Carbide (Fe2C3): 147.73 g/mol