Why is a depletion of the ozone layer harmful?

A) It increases chlorofluorocarbons (CFCs).

B) It allows increased amounts of UV radiation to reach Earth's surface.

C) It increases crop yields.

D) It contaminates ground water.

A sealed, rigid l. 0-liter cylinder contains He gas at STP. An identical sealed cylinder contains Ne gas at STP. These two cylinders contain the same number of (1) atoms (2) electrons (3) ions (4) protons

Which of the following statements best describes the relationship between elements and compounds? A. The properties of compounds always resemble the properties of the elements of which they are made. B.

How do catalysts function? A. They protect the products from external reactions. B. They increase the activation energy of an elementary step of a reaction. C. They lower the activation energy of an elementary step of a reaction. D.

Why are carbon compounds that contain mercury and a greater environment concern than elemental mercury? ... ?

Tap water used for drinking is considered in the DIL calculations. A. True B. False

Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.4 mol h2/mol c2h2. (find properties of the reactants/products in appendix of book) a.

Several properties of the element magnesium are shown. Which one is a chemical property?

How does the quantity of atp produced as a result of activity by the electron transport chain compare to the quantity produced as a result of glycolysis?

Molybdenum has a molar mass of 95.94g/mol. How many molecules of molybdenum are in 150.0 g of molybdenum

Describe a way that people might be able to solve each envioronmental problem listed below. coal mining can harm habitats and cause pollution.