Calories indicate and measure the energy available in food. Fat is the
most calorie-dense food and carbohydrates are the body's preferred
energy source. Protein and carbs each contain 4
calories per gram and fat contains 9 calories per gram.
soap is an alkali so is water, so using these two to wash your hands kills the bacteria because their defense system is a lot stronger than the bacterium cells. i hope i helped well.
