Answer:
12.2 g
Step-by-step explanation:
Step 1: Given data
Mass of O in KClO₄: 5.62 g
Step 2: Calculate the moles corresponding to 5.62 g of O
The molar mass of O is 16.00 g/mol.
5.62 g × (1 mol/16.00 g) = 0.351 mol
Step 3: Calculate the moles of KClO₄ that contain 0.351 moles of O
The molar ratio of KClO₄ to O is 1:4. The moles of KClO₄ that contain 0.351 mol of O are 1/4 × 0.351 mol = 0.0878 mol
Step 4: Calculate the mass corresponding to 0.0878 moles of KClO₄
The molar mass of KClO₄ is 138.55 g/mol.
0.0878 mol × (138.55 g/mol) = 12.2 g