Which term best describes the materials that make up rocks?

A.

sand left by erosion

B.

different kinds of crystals

C.

layers of minerals

D.

compressed magma

What is the pH of 0.0050 HF (Ka = 6.8 x 10-4) ? 2.73 11.70 11.27 2.30

If you add NaOH to a solution containing 0.25 M acetic acid, will the concentration of protons increase or decrease?

A scientist takes a small, partially inflated balloon out of liquid nitrogen (at a very low temperature). As the balloon rests on the table, it begins to grow in size.

If you mixed chlorine, argon, and sodium together, what would you expect to happen?

Calculate the number of atoms in 35 g of carbon. Calculate the number of atoms in 75 g of bromine.

How does light pollution affect plants and animals? Light pollution harms plants and animals because they confuse it with

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

Why do airbags fill evenly with gases?