Question

Какое количество вещества содержится в карбонате калия массой 552 г

Answer 1

Дано : m(K2CO3) = 552 г
найти: n(K2CO3)
решение:n = m / Mr n(K2CO3) = 552 /138= 4 моль

Answer 2

Calculating the Amount of Substance in Potassium Carbonate

To calculate the amount of substance (in moles) in potassium carbonate with a mass of 552 g, we can use the formula:

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

Where: - Mass is the given mass of the substance - Molar mass is the mass of one mole of the substance

Using the provided information, we can calculate the amount of substance in potassium carbonate.

The molar mass of potassium carbonate (K2CO3) can be calculated as follows: - The molar mass of potassium (K) is approximately 39.10 g/mol - The molar mass of carbon (C) is approximately 12.01 g/mol - The molar mass of oxygen (O) is approximately 16.00 g/mol

Therefore, the molar mass of potassium carbonate (K2CO3) is: 2 * (molar mass of potassium) + 1 * (molar mass of carbon) + 3 * (molar mass of oxygen)

Let's calculate the amount of substance in moles using the given mass and the molar mass of potassium carbonate.

Amount of substance (in moles) = 552 g / (2 * 39.10 g/mol + 12.01 g/mol + 3 * 16.00 g/mol)

Amount of substance (in moles) = 552 g / (78.20 g/mol + 12.01 g/mol + 48.00 g/mol)

Amount of substance (in moles) = 552 g / 138.21 g/mol

Amount of substance (in moles) ≈ 3.994 moles

Therefore, the amount of substance in 552 g of potassium carbonate is approximately 3.994 moles.

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