Question

Помогите пожалуйста Сколько атомов хлора содержится в 65г хлорида железа (III) FeCl3?

Answer 1

Находим молекулярную массу хлорида железа 56+3*35,5=162,5
Рассуждаем:
в 162,5 г FeCl3 -------106,5 г Cl
в 65г FeCl3  -------х г
Отсюда Х=  106,5 г *65г / 162,5г
Х=42,6 г

Answer 2

Calculating the Number of Chlorine Atoms in Iron(III) Chloride (FeCl3)

To calculate the number of chlorine atoms in 65g of iron(III) chloride (FeCl3), we can use the concept of molar mass and Avogadro's number.

Step 1: Calculate the Molar Mass of Iron(III) Chloride (FeCl3)

The molar mass of iron(III) chloride (FeCl3) can be calculated by adding the atomic masses of its constituent elements.

The atomic mass of iron (Fe) is approximately 55.85 g/mol, and the atomic mass of chlorine (Cl) is approximately 35.45 g/mol.

Therefore, the molar mass of FeCl3 can be calculated as: Molar mass of FeCl3 = (1 * atomic mass of Fe) + (3 * atomic mass of Cl)

Molar mass of FeCl3 = (1 * 55.85 g/mol) + (3 * 35.45 g/mol)

Molar mass of FeCl3 = 55.85 g/mol + 106.35 g/mol

Molar mass of FeCl3 = 162.2 g/mol

Step 2: Calculate the Number of Moles of FeCl3

Using the given mass of 65g, we can calculate the number of moles of FeCl3 using the formula: Number of moles = Mass / Molar mass

Number of moles of FeCl3 = 65g / 162.2 g/mol Number of moles of FeCl3 ≈ 0.4 moles

Step 3: Calculate the Number of Chlorine Atoms

Since there are 3 chlorine atoms in one molecule of FeCl3, we can calculate the total number of chlorine atoms in 65g of FeCl3 by multiplying the number of moles by the number of chlorine atoms per molecule.

Number of chlorine atoms = Number of moles of FeCl3 * 3

Number of chlorine atoms ≈ 0.4 moles * 3 Number of chlorine atoms ≈ 1.2 moles

Therefore, there are approximately 1.2 moles of chlorine atoms in 65g of iron(III) chloride (FeCl3).

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