Question

Какой объем углекислого газа можно получить разложением 50г карбоната кальция содержащего 20% примесей?

Answer 1

50 гр×20%÷100%=10 гр чистого CaCO3
Mr(CaCO3)=40+12+16×3=100
V(CO2)=10(гр CaCO3)×22,4(постоянная Авогадро)÷100(Mr CaCO3)=2,24 литра CO2

Answer 2

w(CaCO3)=100-20=80

m  (CaCO3)=0.8*50\40

ню =40*100=0.4

V(CO2)=0.4*22.4=8.9

Answer 3

Calculating the Volume of Carbon Dioxide from the Decomposition of Calcium Carbonate

To calculate the volume of carbon dioxide that can be obtained from the decomposition of 50g of calcium carbonate containing 20% impurities, we can use the following steps:

1. Calculate the Amount of Pure Calcium Carbonate: - The given 50g of calcium carbonate contains 20% impurities. - This means the actual amount of pure calcium carbonate is 80% of 50g.

2. Determine the Molar Mass of Calcium Carbonate: - The molar mass of calcium carbonate (CaCO3) is 100.09 g/mol.

3. Calculate the Number of Moles of Calcium Carbonate: - Using the molar mass of calcium carbonate, we can calculate the number of moles present in the given amount.

4. Apply Stoichiometry to Find the Volume of Carbon Dioxide: - The balanced chemical equation for the decomposition of calcium carbonate is: `CaCO3 → CaO + CO2` - From the balanced equation, we can determine the molar ratio between calcium carbonate and carbon dioxide.

5. Use the Ideal Gas Law to Calculate the Volume of Carbon Dioxide: - The ideal gas law equation is: `PV = nRT` - We can use this equation to calculate the volume of carbon dioxide produced.

Let's proceed with the calculations based on the provided information.

Calculation Steps

1. Calculate the Amount of Pure Calcium Carbonate: - 80% of 50g = 0.8 * 50g = 40g

2. Determine the Molar Mass of Calcium Carbonate: - The molar mass of calcium carbonate (CaCO3) is 100.09 g/mol.

3. Calculate the Number of Moles of Calcium Carbonate: - Number of moles = Mass / Molar mass - Number of moles = 40g / 100.09 g/mol

4. Apply Stoichiometry to Find the Volume of Carbon Dioxide: - From the balanced chemical equation: `CaCO3 → CaO + CO2` - The molar ratio between calcium carbonate and carbon dioxide is 1:1.

5. Use the Ideal Gas Law to Calculate the Volume of Carbon Dioxide: - We can use the ideal gas law equation: `PV = nRT` - Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Based on these steps, we can calculate the volume of carbon dioxide produced from the given amount of calcium carbonate.

Let's proceed with the calculations.