What is the name of the supercontinent that existed 245 million years ago

Smith and Cuvier discovered that similar groups of fossils in distant rock layers could be correlated. Why was this such a major breakthrough in geology? A. It disproved the principle of superposition. B.

Rank these elements according to first ionization energy. Na, Li, Rb, K

Of the following groups-adenine, ribose, and phosphate-which changed during the processes that convert among ATP, ADP, amd AMP? Which Group or groups does not change?

A 1.25-g sample contains some of the very reactive compound Al (C6H5) 3. On treating the compound with aqueous HCl, 0.951 g of C6H6 is obtained.

What Type of Reaction is the following: Cu2 (Cr2O7) + Fe (PO4) → Cu3 (PO4) + Fe2 (Cr2O7) 3 1. Synthesis 2. Decomposition 3. Single Replacement 4. Double Replacement

Name two ways that living things use proteins

Solid lithium metal and diatomic fluorine gas react spontaneously to form a solid product. give the balanced chemical equation (including phases) that describes this reaction.

What is the best way to transform a chemical potential energy into internal kinetic energy?

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl) ? * LiOH + KCl - LiCl + KOH A) 64.5% B) 88.6% C) 81.5% D) 92.8%

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.