Question

Решите задачу по химии яка кількість речовини і скільки молекул міститься в so3 масою 48 г?​

Answer 1

Ответ:

n(SO₃) = 0,6 моль

N(SO₃) = 3,6 ·10²³  молекул

Объяснение:

в фото

Answer 2

Calculation of the Amount of Substance and Number of Molecules in SO3

To calculate the amount of substance and the number of molecules in SO3 with a mass of 48 g, we need to use the concept of molar mass and Avogadro's number.

Step 1: Determine the molar mass of SO3 The molar mass of a compound is the mass of one mole of that compound. To calculate the molar mass of SO3, we need to sum up the atomic masses of sulfur (S) and oxygen (O) in the compound.

According to the periodic table, the atomic mass of sulfur (S) is approximately 32.07 g/mol, and the atomic mass of oxygen (O) is approximately 16.00 g/mol.

Molar mass of SO3 = (1 × atomic mass of S) + (3 × atomic mass of O) Molar mass of SO3 = (1 × 32.07 g/mol) + (3 × 16.00 g/mol) Molar mass of SO3 = 32.07 g/mol + 48.00 g/mol Molar mass of SO3 = 80.07 g/mol

Step 2: Calculate the amount of substance (in moles) The amount of substance is measured in moles. To calculate the amount of substance, we can use the formula:

Amount of substance (in moles) = Mass of substance / Molar mass

In this case, the mass of the substance is given as 48 g.

Amount of substance (in moles) = 48 g / 80.07 g/mol Amount of substance (in moles) ≈ 0.599 mol

Therefore, the amount of substance in SO3 with a mass of 48 g is approximately 0.599 moles.

Step 3: Calculate the number of molecules Avogadro's number (6.022 × 10^23) represents the number of particles (atoms, molecules, or ions) in one mole of a substance. To calculate the number of molecules in SO3, we can use the formula:

Number of molecules = Amount of substance (in moles) × Avogadro's number

Number of molecules = 0.599 mol × (6.022 × 10^23 molecules/mol) Number of molecules ≈ 3.605 × 10^23 molecules

Therefore, in SO3 with a mass of 48 g, there are approximately 3.605 × 10^23 molecules.

Please note that the values provided above are approximate due to the rounding of atomic masses and Avogadro's number.

I hope this helps! Let me know if you have any further questions.