When two continental plates diverge, there is a valley in between these two plates that forms as the continental crust widens. What geological event is a result of this interaction?

A) Hurricanes

B) Volcanoes

C) Tsunamis

D) Earthquakes

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.