Which of the following statements about the modified standard state for biochemistry are true, and which are false? 1. [h+] = 1 m2. the standard state concentration of all solutes is 1 m.3. the standard state concentration of [oh-] is 1 × 10-7 m.4. the standard state concentration of all solutes except h+ is 1 m.

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o