The amount of energy necessary to raise the temperature of 1 kilogram of liquid water by 1 C a. is one calorie. Sucrose has a molecular weight of 342 daltons. An acid is a substance that a. adds hydrogen ions to solutions. Select the statement that best describes a buffer. Buffered solutions are always neutral, with a pH of 7.
Buffers cause acidic solutions to become alkaline, and alkaline solutions to become acidic.
Buffers prevent the pH of a solution from changing when an acid or base is added. All of the above are possible. The four main categories of macromolecules in a cell are a. proteins, nucleic acids, carbohydrates, and lipids. The characteristic that all lipids have in common is that a. none of them is very high in energy content. The bonds between sugars in cellulose are much stronger.