Question

Вычислите объем азота(н.у.), необходимого для реакции с 80г кальция

Answer 1

3Ca+N2=Ca3N2
nca=80/40=2 моль
nN2=1/3nCa=0.66 моль
VN2=2*22.4л/моль*0,66моль=29ю86 л

Answer 2

Calculating the Volume of Nitrogen Gas (N2) Required for the Reaction with 80g of Calcium

To calculate the volume of nitrogen gas (N2) required for the reaction with 80g of calcium, we can use the stoichiometry of the balanced chemical equation for the reaction between calcium and nitrogen gas.

The balanced chemical equation for the reaction between calcium and nitrogen gas is: 3Ca + N2 → Ca3N2

From the balanced chemical equation, we can see that 3 moles of calcium react with 1 mole of nitrogen gas to produce 1 mole of calcium nitride.

Given that the molar mass of calcium (Ca) is approximately 40.08 g/mol and the molar mass of nitrogen gas (N2) is approximately 28.02 g/mol, we can proceed with the calculation.

Using the molar masses of calcium and nitrogen gas, we can first calculate the number of moles of calcium in 80g of calcium.

The number of moles of calcium (Ca) can be calculated using the formula: Number of moles = Mass / Molar mass

Substituting the values, we get: Number of moles of Ca = 80g / 40.08 g/mol

Now, we can use the stoichiometry of the balanced chemical equation to find the number of moles of nitrogen gas (N2) required for the reaction with the calculated moles of calcium.

According to the balanced chemical equation, 3 moles of calcium react with 1 mole of nitrogen gas. Therefore, the number of moles of nitrogen gas required can be calculated as: Number of moles of N2 = (Number of moles of Ca) / 3

Finally, we can use the ideal gas law to calculate the volume of nitrogen gas (N2) required at standard temperature and pressure (STP).

The ideal gas law is given by the formula: V = nRT/P

Where: - V = Volume of the gas - n = Number of moles of the gas - R = Ideal gas constant (approximately 0.0821 L·atm/(K·mol)) - T = Temperature in Kelvin (approximately 273.15 K at STP) - P = Pressure (approximately 1 atm at STP)

Substituting the values, we can calculate the volume of nitrogen gas (N2) required for the reaction with 80g of calcium.

I hope this helps! If you have any further questions, feel free to ask.