Explain how acid–base indicators can be used to determine the approximate ph of a substance.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate