Question

Дана масса серной кислоты 237г. Нужно найти количество вещества и молекул

Answer 1

Ответ:

n=m:M=237:98=2,4моль

N=n×Na=2,4×6×10²³=14,4×10²³

Ответ: количество вещества=2,4 моль; количество молекул=14,4×10²³

Answer 2

Calculation of the Amount of Substance and Number of Molecules in Sulfuric Acid

To find the amount of substance and the number of molecules in a given mass of sulfuric acid, we need to use the molar mass of sulfuric acid and Avogadro's number.

1. Molar Mass of Sulfuric Acid: The molar mass of sulfuric acid (H2SO4) can be calculated by summing the atomic masses of its constituent elements. The atomic masses of hydrogen (H), sulfur (S), and oxygen (O) are approximately 1 g/mol, 32 g/mol, and 16 g/mol, respectively.

Therefore, the molar mass of sulfuric acid is: 2(1 g/mol) + 32 g/mol + 4(16 g/mol) = 98 g/mol.

2. Calculating the Amount of Substance: The amount of substance (n) can be calculated using the formula:

n = mass / molar mass

Given that the mass of sulfuric acid is 237 g, we can calculate the amount of substance as follows:

n = 237 g / 98 g/mol = 2.42 mol

Therefore, the amount of substance in 237 g of sulfuric acid is approximately 2.42 mol.

3. Calculating the Number of Molecules: Avogadro's number (NA) represents the number of particles (atoms, molecules, or ions) in one mole of a substance. It is approximately equal to 6.022 × 10^23 particles/mol.

To calculate the number of molecules in the given amount of substance, we multiply the amount of substance by Avogadro's number:

Number of molecules = amount of substance × Avogadro's number

Number of molecules = 2.42 mol × (6.022 × 10^23 molecules/mol)

Therefore, the number of molecules in 237 g of sulfuric acid is approximately 1.46 × 10^24 molecules.

In summary, the amount of substance in 237 g of sulfuric acid is approximately 2.42 mol, and the number of molecules is approximately 1.46 × 10^24 molecules.