Ateam of scientists is studying the fossils in the cross-section of rock shown below. between which two layer of fossils can secondary succession be observed? a) layers 1 and 2. b) layers 2 and 3. c) layers 3 and 4. d) layers 1 and 4.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

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

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?