Baking times for chicken in the oven will depend on whether it's a whole chicken, boneless pieces, or bone-in pieces. The times will vary greatly, ranging from 20-30 minutes up to 1 1/2 - 2 hours. For great instructions go here: http://howtobakeachickenintheoven.com/
Sometimes it is best to purchase the chickens that have pop up timers. It will let you know when the chicken is done and at the right temperature. Bake at 400 degrees for about 45 minutes. The chicken is ready when the juices inside the chicken are clear and clean.
The time required for baking chicken depends on what part you are baking. A whole chicken is baked as a turkey is according to weight. Breast must bake at least an hour. Thighs, legs and wings a little less.