A: mouth. Chemical digestion begins in the mouth when enzymes in saliva begin to break down carbohydrates. Most chemical changes in digestion occur in the small intestine. Large molecules of food are broken down into smaller molecules that can be absorbed by our cells.
<span>Phosphorus has 1 less proton and electron than sulfur in this case because remember the amount of protons are equal to the amount of electrons in the element. </span>
Less than. The concentration is the moles per unit volume. If the solution is diluted, less moles are present in the same volume so the concentration is less
For water to be drinkable, it must have sufficiently low levels of dissolved salts and microbes.
