The buildup of lactic acid in muscles causes pain during extreme physical exertion. the ka for lactic acid (c2h5ocooh) is 8.4 × 10−4 . calculate the ph of a 0.06 m solution of lactic acid. 1. 2.297 2. 11.851 3. 2.174 4. 2.043 5. 2.149 6. 6.348 7. 1.926 8. 3.533

The table below shows the freezing points of four substances. substance freezing point (°c) benzene 5.5 water 0 butane –138 nitrogen –210 the substances are placed in separate containers at room temperature, and each container is gradually cooled. which of these substances will solidify before the temperature reaches 0°c? benzene water butane nitrogen