Oven-Roasted BBQ Chicken (The Best)

Name: Oven-Roasted BBQ Chicken (The Best)
Prep time: 15 min
Cook time: 1 h 15 min
Total time: 1 h 30 min
Cuisine: American
Ingredients: 1 chicken, about 3 lb (1.5 kg); 1 teaspoon (5 ml) salt; 2 tablespoons (30 ml) ketchup; 2 tablespoons (30 ml) unsalted butter, softened; 2 teaspoons (10 ml) paprika; 2 teaspoons (10 ml) dry mustard; 1 teaspoon (5 ml) brown sugar; 1/2 teaspoon (2.5 ml) onion powder; 1/2 teaspoon (2.5 ml) garlic powder; 1/2 teaspoon (2.5 ml) ground pepper; 1/4 teaspoon (1 ml) celery salt