When did Pangaea begin to break apart?

a. 20 million years ago

c. 250 million years ago

b. 100 million years ago

d. 2 billion years ago.

When an object is lifted 6 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 18 meters off the ground, its potential energy is A. six times as much. B. the same. C. three times as much. D.

Determine the mass of a billion gold (u) atoms

Determine the molar mass for the element Zn

A sample of an unknown compound was decomposed and found to be composed of 1.36 mol oxygen, 4.10 mol hydrogen, and 2.05 mol carbon. what is the empirical formula of the unknown compound? c3h6o2c2h4o c1.5h3o c2h3o

On the present Periodic table of the elements, the elements are arranged according to increasing what?

How can there be snow near a giraffe's home This is actually science so yeah

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.

What is the process all rocks are continuously in during which that can change into other types of rocks

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?