Question

какую массу оксида магния можно получить при реакции 48г магния с 44 л кислорода?

Answer 1

Решение решение решение

Answer 2

Calculating the Mass of Magnesium Oxide Produced

To calculate the mass of magnesium oxide produced from the reaction of 48g of magnesium with 44L of oxygen, we can use the stoichiometry of the reaction to determine the amount of magnesium oxide formed.

The balanced chemical equation for the reaction between magnesium and oxygen is:

2Mg + O2 → 2MgO

From the balanced equation, we can see that 2 moles of magnesium react with 1 mole of oxygen to produce 2 moles of magnesium oxide.

Using the Molar Masses

First, we need to find the molar masses of magnesium and oxygen.

- The molar mass of magnesium (Mg) is approximately 24.305 g/mol. - The molar mass of oxygen (O2) is approximately 32 g/mol.

Calculating the Moles of Magnesium and Oxygen

Given: - Mass of magnesium (Mg) = 48g - Volume of oxygen (O2) = 44L

We need to convert the volume of oxygen to moles using the ideal gas law before proceeding with the calculation.

Ideal Gas Law Calculation

Using the ideal gas law equation: PV = nRT

Where: - P = pressure (assume standard pressure, 1 atm) - V = volume (44L) - n = number of moles - R = ideal gas constant (0.0821 L·atm/mol·K) - T = temperature (assume standard temperature, 273K)

We can rearrange the equation to solve for n: n = PV/RT

Substitute the given values: n = (1 atm * 44L) / (0.0821 L·atm/mol·K * 273K)

Calculating n gives us the number of moles of oxygen.

Calculating the Mass of Magnesium Oxide

Now that we have the moles of magnesium and oxygen, we can use the stoichiometry of the reaction to determine the moles of magnesium oxide produced.

Given: - Moles of magnesium (Mg) = 48g / 24.305 g/mol - Moles of oxygen (O2) = (calculated from the ideal gas law)

From the balanced chemical equation: 2 moles of magnesium produce 2 moles of magnesium oxide.

Using this information, we can calculate the moles of magnesium oxide produced.

Finally, we can convert the moles of magnesium oxide to grams using the molar mass of magnesium oxide, which is the sum of the molar masses of magnesium and oxygen.

Conclusion

By following these steps, we can calculate the mass of magnesium oxide that can be produced from the given reaction.