Final answer:
To find the mass of oxygen produced when 250 g of calcium chlorate decomposes, we can use the balanced chemical equation, moles, and molar mass. The mass of oxygen produced is approximately 108.096 g.
Step-by-step explanation:
To find the mass of oxygen produced when 250 g of calcium chlorate decomposes, we need to know the balanced chemical equation for the reaction. The balanced equation is:
2Ca(ClO3)2 → 2CaCl2 + 3O2
From the balanced equation, we can see that for every 2 moles of calcium chlorate that decompose, 3 moles of oxygen are produced.
To find the mass of oxygen produced, we can use the molar mass of oxygen (32 g/mol) and the molar mass of calcium chlorate (111 g/mol) to convert grams of calcium chlorate to moles, and then use the mole ratio from the balanced equation to find moles of oxygen, and finally convert back to grams using the molar mass of oxygen. The calculation is as follows:
Convert grams of calcium chlorate to moles: 250 g / 111 g/mol = 2.252 mol
Use the mole ratio from the balanced equation: 2.252 mol of calcium chlorate * (3 mol of O2 / 2 mol of calcium chlorate) = 3.378 mol of O2
Convert moles of oxygen to grams: 3.378 mol * 32 g/mol = 108.096 g
Therefore, the mass of oxygen produced when 250 g of calcium chlorate decomposes is approximately 108.096 g.