Cook the rice according to package instructions. Season with salt and pepper to taste.
Cook the chicken: In a skillet, heat the olive oil over medium heat. Season the chicken with chili powder, cumin, garlic powder, salt, and pepper. Cook the chicken, browning well, to an internal temperature of 160°F (71°C). Set aside.
Make the salsa: Add all ingredients (except the tortilla chips) to a blender and pulse until mixed well. Season with salt and pepper to taste. Set aside.
Assemble burritos: Lay out the flour tortillas. In the center of each tortilla, add cooked rice, chicken, diced tomatoes, shredded cheddar cheese.
Fold the sides of the tortilla over the filling, then roll it up tightly to form a burrito.
Mix the sparkling water and lemon slices together. Serve over ice if desired
Enjoy chicken and rice burrito with sour cream, chips and salsa, and lemon sparkling water.